How to count kafka topic message?

How to count kafka topic message? - apache-kafka

[kafka consumer[kafka-producer][1]```
[root#kafka1 kafka_2.13-2.7.0]# bin/kafka-run-class.sh kafka.tools.GetOffsetShell --broker-list kafka1:9092 --topic new-cluster-test --time -1 --offsets 1 | awk -F ":" '{sum += $3} END {print sum}'
[2021-05-18 02:33:16,390] WARN [Consumer clientId=GetOffsetShell, groupId=null] Bootstrap broker kafka1:9092 (id: -1 rack: null) disconnected (org.apache.kafka.clients.NetworkClient)
[2021-05-18 02:33:16,794] WARN [Consumer clientId=GetOffsetShell, groupId=null] Bootstrap broker kafka1:9092 (id: -1 rack: null) disconnected (org.apache.kafka.clients.NetworkClient)
[2021-05-18 02:33:17,198] WARN [Consumer clientId=GetOffsetShell, groupId=null] Bootstrap broker kafka1:9092 (id: -1 rack: null) disconnected (org.apache.kafka.clients.NetworkClient)
[2021-05-18 02:33:17,546] WARN [Consumer clientId=GetOffsetShell, groupId=null] Bootstrap broker kafka1:9092 (id: -1 rack: null) disconnected (org.apache.kafka.clients.NetworkClient)
[2021-05-18 02:33:17,824] WARN [Consumer clientId=GetOffsetShell, groupId=null] Bootstrap broker kafka1:9092 (id: -1 rack: null) disconnected (org.apache.kafka.clients.NetworkClient)
[2021-05-18 02:33:18,227] WARN [Consumer clientId=GetOffsetShell, groupId=null] Bootstrap broker kafka1:9092 (id: -1 rack: null) disconnected (org.apache.kafka.clients.NetworkClient)
^C
[root#kafka1 kafka_2.13-2.7.0]# bin/kafka-topics.sh --version
2.7.0 (Commit:448719dc99a19793)
[root#kafka1 kafka_2.13-2.7.0]#
[1]: https://i.stack.imgur.com/s93dH.png

I was using SASL_PLAINTEXT listeners protocol with krb5 and so it is not authenticating without config(client.properties) file on port 9092.
I have exported the JMX_PORT in kafka-server-start.sh and added dual listeners for kafka (SASL_PLAINTEXT and PLAINTEXT) on separate port(9094).
Restarted the Zookeeper and Kakfa, Now I'm able to get the count.
[root#kafka1 kafka_2.13-2.7.0]# bin/kafka-run-class.sh kafka.tools.GetOffsetShell --broker-list kafka1:9094 --topic new-cluster-test --time -1 | awk -F ":" '{sum += $3} END {print sum}'
114
[root#kafka1 kafka_2.13-2.7.0]# bin/kafka-run-class.sh kafka.tools.GetOffsetShell --broker-list kafka1:9094 --topic new-cluster-test --time -1
new-cluster-test:0:13
new-cluster-test:1:19
new-cluster-test:2:28
new-cluster-test:3:15
new-cluster-test:4:14
new-cluster-test:5:25

Related

Kafka consumer disconnected from kafka cli

I a consuming Kafka messages from Kafka cli with following command
kafka-console-consumer.bat --bootstrap-server kafka:9092 --from-beginning --topic mytopic --consumer.config ....\config\consumer.properties
and I am getting following errors
[2022-09-23 15:59:33,175] WARN [Consumer clientId=console-consumer, groupId=group] Bootstrap broker kafka:9092 (id: -1 rack: null) disconnected (org.apache.kafka.clients.NetworkClient)
[2022-09-23 15:59:54,344] WARN [Consumer clientId=console-consumer, groupId=group] Connection to node -1 (kafka:9092) could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
[2022-09-23 15:59:54,345] WARN [Consumer clientId=console-consumer, groupId=group] Bootstrap broker kafka:9092 (id: -1 rack: null) disconnected (org.apache.kafka.clients.NetworkClient)
[2022-09-23 16:00:15,634] WARN [Consumer clientId=console-consumer, groupId=group] Connection to node -1 (kafka:9092) could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
I have updated server.properties with following configuration
port = 9092
advertised.host.name = kafka
KAFKA_CFG_LISTENERS=PLAINTEXT://kafka:9092
advertised.listeners=PLAINTEXT://kafka:9092

When collecting data with Modbus protocol through kafka Producer, collection stops after a certain period of time

I have deployed a Kafka cluster on a GCP instance.
I used the connector through config/connect-distributed.properties.
Start collecting data through restapi using the following command:
curl -X POST -H "Content-Type:application/json" \
--data '{
"name": "operation1",
"config": {
"connector.class": "org.apache.plc4x.kafka.Plc4xSourceConnector",
"default.topic": "operation1",
"tasks.max": "1",
"sources": "Modbus",
"sources.Modbus.connectionString": "modbus:tcp://<IP address:port>",
"sources.Modbus.pollReturnInterval": "10000",
"sources.Modbus.bufferSize": "5000",
"sources.Modbus.jobReferences": "operation1",
"jobs": "operation1",
"jobs.operation1.fields": "BMS1-1, BMS1-2, BMS2-1, BMS2-2, BMS2-3, PCS, ETC",
"jobs.operation1.interval": "1000",
"jobs.operation1.fields.BMS1-1": "input-register:1[125]",
"jobs.operation1.fields.BMS1-2": "input-register:126[12]",
"jobs.operation1.fields.BMS2-1": "input-register:201[125]",
"jobs.operation1.fields.BMS2-2": "input-register:326[125]",
"jobs.operation1.fields.BMS2-3": "input-register:451[16]",
"jobs.operation1.fields.PCS": "input-register:501[89]",
"jobs.operation1.fields.ETC": "input-register:601[5]"
}
}' http://localhost:8083/connectors
In the log of config/connect-distributed.properties , the following log appears and collection is successful. However, collection stops after a certain amount of time (minutes or hours).
[2022-05-10 05:36:44,522] INFO [operation1|task-0|offsets] WorkerSourceTask{id=operation1-0} Either no records were produced by the task since the last offset commit, or every record has been filtered out by a transformation or dropped due to transformation or conversion errors. (org.apache.kafka.connect.runtime.WorkerSourceTask:484)
[2022-05-10 05:36:54,526] INFO [operation1|task-0|offsets] WorkerSourceTask{id=operation1-0} Either no records were produced by the task since the last offset commit, or every record has been filtered out by a transformation or dropped due to transformation or conversion errors. (org.apache.kafka.connect.runtime.WorkerSourceTask:484)
[2022-05-10 05:37:04,530] INFO [operation1|task-0|offsets] WorkerSourceTask{id=operation1-0} Either no records were produced by the task since the last offset commit, or every record has been filtered out by a transformation or dropped due to transformation or conversion errors. (org.apache.kafka.connect.runtime.WorkerSourceTask:484)
[2022-05-10 05:37:14,534] INFO [operation1|task-0|offsets] WorkerSourceTask{id=operation1-0} Either no records were produced by the task since the last offset commit, or every record has been filtered out by a transformation or dropped due to transformation or conversion errors. (org.apache.kafka.connect.runtime.WorkerSourceTask:484)
[2022-05-10 05:37:24,550] INFO [operation1|task-0|offsets] WorkerSourceTask{id=operation1-0} Either no records were produced by the task since the last offset commit, or every record has been filtered out by a transformation or dropped due to transformation or conversion errors. (org.apache.kafka.connect.runtime.WorkerSourceTask:484)
[2022-05-10 05:37:34,554] INFO [operation1|task-0|offsets] WorkerSourceTask{id=operation1-0} Either no records were produced by the task since the last offset commit, or every record has been filtered out by a transformation or dropped due to transformation or conversion errors. (org.apache.kafka.connect.runtime.WorkerSourceTask:484)
After a certain amount of time, the log message changes to the following:
[2022-05-10 05:42:36,597] WARN [operation1|task-0] Exception during scraping of Job operation1, Connection-Alias Modbus: Error-message: null - for stack-trace change logging to DEBUG (org.apache.plc4x.java.scraper.triggeredscraper.TriggeredScraperTask:148)
[2022-05-10 05:42:38,598] WARN [operation1|task-0] Exception during scraping of Job operation1, Connection-Alias Modbus: Error-message: null - for stack-trace change logging to DEBUG (org.apache.plc4x.java.scraper.triggeredscraper.TriggeredScraperTask:148)
[2022-05-10 05:42:40,598] WARN [operation1|task-0] Exception during scraping of Job operation1, Connection-Alias Modbus: Error-message: null - for stack-trace change logging to DEBUG (org.apache.plc4x.java.scraper.triggeredscraper.TriggeredScraperTask:148)
[2022-05-10 05:42:42,599] WARN [operation1|task-0] Exception during scraping of Job operation1, Connection-Alias Modbus: Error-message: null - for stack-trace change logging to DEBUG (org.apache.plc4x.java.scraper.triggeredscraper.TriggeredScraperTask:148)
[2022-05-10 05:42:44,600] WARN [operation1|task-0] Exception during scraping of Job operation1, Connection-Alias Modbus: Error-message: null - for stack-trace change logging to DEBUG (org.apache.plc4x.java.scraper.triggeredscraper.TriggeredScraperTask:148)
At this time, if you check the status of the Connector with curl , it is still Running.
curl -X GET localhost:8083/connectors/operation1/status
{"name":"operation1","connector":{"state":"RUNNING","worker_id":"<IP>:8083"},"tasks":[{"id":0,"state":"RUNNING","worker_id":"<IP>:8083"}],"type":"source"}
I really don't know why. Help
Logs modified to DEBUG level.
[2022-05-10 08:14:18,708] DEBUG [Consumer clientId=consumer-connect-cluster-1, groupId=connect-cluster] Added READ_UNCOMMITTED fetch request for partition connect-offsets-12 at position FetchPosition{offset=0, offsetEpoch=Optional.empty, currentLeader=LeaderAndEpoch{leader=Optional[<IP>76.32:9092 (id: 1 rack: null)], epoch=23}} to node <IP>76.32:9092 (id: 1 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:1245)
[2022-05-10 08:14:18,708] DEBUG [Consumer clientId=consumer-connect-cluster-1, groupId=connect-cluster] Added READ_UNCOMMITTED fetch request for partition connect-offsets-0 at position FetchPosition{offset=0, offsetEpoch=Optional.empty, currentLeader=LeaderAndEpoch{leader=Optional[<IP>76.32:9092 (id: 1 rack: null)], epoch=23}} to node <IP>76.32:9092 (id: 1 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:1245)
[2022-05-10 08:14:18,708] DEBUG [Consumer clientId=consumer-connect-cluster-1, groupId=connect-cluster] Added READ_UNCOMMITTED fetch request for partition connect-offsets-6 at position FetchPosition{offset=0, offsetEpoch=Optional.empty, currentLeader=LeaderAndEpoch{leader=Optional[<IP>76.32:9092 (id: 1 rack: null)], epoch=23}} to node <IP>76.32:9092 (id: 1 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:1245)
[2022-05-10 08:14:18,709] DEBUG [Consumer clientId=consumer-connect-cluster-1, groupId=connect-cluster] Added READ_UNCOMMITTED fetch request for partition connect-offsets-18 at position FetchPosition{offset=0, offsetEpoch=Optional.empty, currentLeader=LeaderAndEpoch{leader=Optional[<IP>76.32:9092 (id: 1 rack: null)], epoch=23}} to node <IP>76.32:9092 (id: 1 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:1245)
[2022-05-10 08:14:18,709] DEBUG [Consumer clientId=consumer-connect-cluster-1, groupId=connect-cluster] Added READ_UNCOMMITTED fetch request for partition connect-offsets-9 at position FetchPosition{offset=0, offsetEpoch=Optional.empty, currentLeader=LeaderAndEpoch{leader=Optional[<IP>76.32:9092 (id: 1 rack: null)], epoch=23}} to node <IP>76.32:9092 (id: 1 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:1245)
[2022-05-10 08:14:18,709] DEBUG [Consumer clientId=consumer-connect-cluster-1, groupId=connect-cluster] Added READ_UNCOMMITTED fetch request for partition connect-offsets-3 at position FetchPosition{offset=0, offsetEpoch=Optional.empty, currentLeader=LeaderAndEpoch{leader=Optional[<IP>76.32:9092 (id: 1 rack: null)], epoch=23}} to node <IP>76.32:9092 (id: 1 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:1245)
[2022-05-10 08:14:18,709] DEBUG [Consumer clientId=consumer-connect-cluster-1, groupId=connect-cluster] Added READ_UNCOMMITTED fetch request for partition connect-offsets-15 at position FetchPosition{offset=0, offsetEpoch=Optional.empty, currentLeader=LeaderAndEpoch{leader=Optional[<IP>76.32:9092 (id: 1 rack: null)], epoch=23}} to node <IP>76.32:9092 (id: 1 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:1245)
[2022-05-10 08:14:18,709] DEBUG [Consumer clientId=consumer-connect-cluster-1, groupId=connect-cluster] Added READ_UNCOMMITTED fetch request for partition connect-offsets-21 at position FetchPosition{offset=0, offsetEpoch=Optional.empty, currentLeader=LeaderAndEpoch{leader=Optional[<IP>76.32:9092 (id: 1 rack: null)], epoch=23}} to node <IP>76.32:9092 (id: 1 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:1245)
[2022-05-10 08:14:18,709] DEBUG [Consumer clientId=consumer-connect-cluster-1, groupId=connect-cluster] Added READ_UNCOMMITTED fetch request for partition connect-offsets-24 at position FetchPosition{offset=18793, offsetEpoch=Optional[23], currentLeader=LeaderAndEpoch{leader=Optional[<IP>76.32:9092 (id: 1 rack: null)], epoch=23}} to node <IP>76.32:9092 (id: 1 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:1245)
[2022-05-10 08:14:18,709] DEBUG [Consumer clientId=consumer-connect-cluster-1, groupId=connect-cluster] Built incremental fetch (sessionId=714175396, epoch=1010) for node 1. Added 0 partition(s), altered 0 partition(s), removed 0 partition(s), replaced 0 partition(s) out of 9 partition(s) (org.apache.kafka.clients.FetchSessionHandler:351)
[2022-05-10 08:14:18,709] DEBUG [Consumer clientId=consumer-connect-cluster-1, groupId=connect-cluster] Sending READ_UNCOMMITTED IncrementalFetchRequest(toSend=(), toForget=(), toReplace=(), implied=(connect-offsets-12, connect-offsets-0, connect-offsets-6, connect-offsets-18, connect-offsets-9, connect-offsets-3, connect-offsets-15, connect-offsets-21, connect-offsets-24), canUseTopicIds=True) to broker <IP>76.32:9092 (id: 1 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:274)
[2022-05-10 08:14:18,709] DEBUG [Consumer clientId=consumer-connect-cluster-1, groupId=connect-cluster] Sending FETCH request with header RequestHeader(apiKey=FETCH, apiVersion=13, clientId=consumer-connect-cluster-1, correlationId=3034) and timeout 30000 to node 1: FetchRequestData(clusterId=null, replicaId=-1, maxWaitMs=500, minBytes=1, maxBytes=52428800, isolationLevel=0, sessionId=714175396, sessionEpoch=1010, topics=[], forgottenTopicsData=[], rackId='') (org.apache.kafka.clients.NetworkClient:521)
[2022-05-10 08:14:18,757] DEBUG [Consumer clientId=consumer-connect-cluster-2, groupId=connect-cluster] Received FETCH response from node 1 for request with header RequestHeader(apiKey=FETCH, apiVersion=13, clientId=consumer-connect-cluster-2, correlationId=3030): FetchResponseData(throttleTimeMs=0, errorCode=0, sessionId=1712137779, responses=[]) (org.apache.kafka.clients.NetworkClient:879)
[2022-05-10 08:14:18,757] DEBUG [Consumer clientId=consumer-connect-cluster-2, groupId=connect-cluster] Node 1 sent an incremental fetch response with throttleTimeMs = 0 for session 1712137779 with 0 response partition(s), 1 implied partition(s) (org.apache.kafka.clients.FetchSessionHandler:584)
[2022-05-10 08:14:18,758] DEBUG [Consumer clientId=consumer-connect-cluster-2, groupId=connect-cluster] Added READ_UNCOMMITTED fetch request for partition connect-status-2 at position FetchPosition{offset=0, offsetEpoch=Optional.empty, currentLeader=LeaderAndEpoch{leader=Optional[<IP>76.32:9092 (id: 1 rack: null)], epoch=23}} to node <IP>76.32:9092 (id: 1 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:1245)
[2022-05-10 08:14:18,758] DEBUG [Consumer clientId=consumer-connect-cluster-2, groupId=connect-cluster] Built incremental fetch (sessionId=1712137779, epoch=1006) for node 1. Added 0 partition(s), altered 0 partition(s), removed 0 partition(s), replaced 0 partition(s) out of 1 partition(s) (org.apache.kafka.clients.FetchSessionHandler:351)
[2022-05-10 08:14:18,758] DEBUG [Consumer clientId=consumer-connect-cluster-2, groupId=connect-cluster] Sending READ_UNCOMMITTED IncrementalFetchRequest(toSend=(), toForget=(), toReplace=(), implied=(connect-status-2), canUseTopicIds=True) to broker <IP>76.32:9092 (id: 1 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:274)
[2022-05-10 08:14:18,758] DEBUG [Consumer clientId=consumer-connect-cluster-2, groupId=connect-cluster] Sending FETCH request with header RequestHeader(apiKey=FETCH, apiVersion=13, clientId=consumer-connect-cluster-2, correlationId=3033) and timeout 30000 to node 1: FetchRequestData(clusterId=null, replicaId=-1, maxWaitMs=500, minBytes=1, maxBytes=52428800, isolationLevel=0, sessionId=1712137779, sessionEpoch=1006, topics=[], forgottenTopicsData=[], rackId='') (org.apache.kafka.clients.NetworkClient:521)
[2022-05-10 08:14:18,759] DEBUG [Consumer clientId=consumer-connect-cluster-2, groupId=connect-cluster] Received FETCH response from node 0 for request with header RequestHeader(apiKey=FETCH, apiVersion=13, clientId=consumer-connect-cluster-2, correlationId=3031): FetchResponseData(throttleTimeMs=0, errorCode=0, sessionId=619420322, responses=[]) (org.apache.kafka.clients.NetworkClient:879)
[2022-05-10 08:14:18,759] DEBUG [Consumer clientId=consumer-connect-cluster-3, groupId=connect-cluster] Received FETCH response from node 0 for request with header RequestHeader(apiKey=FETCH, apiVersion=13, clientId=consumer-connect-cluster-3, correlationId=1014): FetchResponseData(throttleTimeMs=0, errorCode=0, sessionId=208110829, responses=[]) (org.apache.kafka.clients.NetworkClient:879)
[2022-05-10 08:14:18,759] DEBUG [Consumer clientId=consumer-connect-cluster-3, groupId=connect-cluster] Node 0 sent an incremental fetch response with throttleTimeMs = 0 for session 208110829 with 0 response partition(s), 1 implied partition(s) (org.apache.kafka.clients.FetchSessionHandler:584)
[2022-05-10 08:14:18,759] DEBUG [Consumer clientId=consumer-connect-cluster-2, groupId=connect-cluster] Node 0 sent an incremental fetch response with throttleTimeMs = 0 for session 619420322 with 0 response partition(s), 2 implied partition(s) (org.apache.kafka.clients.FetchSessionHandler:584)
[2022-05-10 08:14:18,760] DEBUG [Consumer clientId=consumer-connect-cluster-3, groupId=connect-cluster] Added READ_UNCOMMITTED fetch request for partition connect-configs-0 at position FetchPosition{offset=698, offsetEpoch=Optional[54], currentLeader=LeaderAndEpoch{leader=Optional[<IP>92.153:9092 (id: 0 rack: null)], epoch=54}} to node <IP>92.153:9092 (id: 0 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:1245)
[2022-05-10 08:14:18,760] DEBUG [Consumer clientId=consumer-connect-cluster-2, groupId=connect-cluster] Added READ_UNCOMMITTED fetch request for partition connect-status-3 at position FetchPosition{offset=129, offsetEpoch=Optional[50], currentLeader=LeaderAndEpoch{leader=Optional[<IP>92.153:9092 (id: 0 rack: null)], epoch=54}} to node <IP>92.153:9092 (id: 0 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:1245)
[2022-05-10 08:14:18,760] DEBUG [Consumer clientId=consumer-connect-cluster-3, groupId=connect-cluster] Built incremental fetch (sessionId=208110829, epoch=1008) for node 0. Added 0 partition(s), altered 0 partition(s), removed 0 partition(s), replaced 0 partition(s) out of 1 partition(s) (org.apache.kafka.clients.FetchSessionHandler:351)
[2022-05-10 08:14:18,760] DEBUG [Consumer clientId=consumer-connect-cluster-3, groupId=connect-cluster] Sending READ_UNCOMMITTED IncrementalFetchRequest(toSend=(), toForget=(), toReplace=(), implied=(connect-configs-0), canUseTopicIds=True) to broker <IP>92.153:9092 (id: 0 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:274)
[2022-05-10 08:14:18,760] DEBUG [Consumer clientId=consumer-connect-cluster-3, groupId=connect-cluster] Sending FETCH request with header RequestHeader(apiKey=FETCH, apiVersion=13, clientId=consumer-connect-cluster-3, correlationId=1015) and timeout 30000 to node 0: FetchRequestData(clusterId=null, replicaId=-1, maxWaitMs=500, minBytes=1, maxBytes=52428800, isolationLevel=0, sessionId=208110829, sessionEpoch=1008, topics=[], forgottenTopicsData=[], rackId='') (org.apache.kafka.clients.NetworkClient:521)
[2022-05-10 08:14:18,760] DEBUG [Consumer clientId=consumer-connect-cluster-2, groupId=connect-cluster] Added READ_UNCOMMITTED fetch request for partition connect-status-0 at position FetchPosition{offset=116, offsetEpoch=Optional[54], currentLeader=LeaderAndEpoch{leader=Optional[<IP>92.153:9092 (id: 0 rack: null)], epoch=54}} to node <IP>92.153:9092 (id: 0 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:1245)
[2022-05-10 08:14:18,760] DEBUG [Consumer clientId=consumer-connect-cluster-2, groupId=connect-cluster] Built incremental fetch (sessionId=619420322, epoch=1008) for node 0. Added 0 partition(s), altered 0 partition(s), removed 0 partition(s), replaced 0 partition(s) out of 2 partition(s) (org.apache.kafka.clients.FetchSessionHandler:351)
[2022-05-10 08:14:18,760] DEBUG [Consumer clientId=consumer-connect-cluster-2, groupId=connect-cluster] Sending READ_UNCOMMITTED IncrementalFetchRequest(toSend=(), toForget=(), toReplace=(), implied=(connect-status-0, connect-status-3), canUseTopicIds=True) to broker <IP>92.153:9092 (id: 0 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:274)
[2022-05-10 08:14:18,760] DEBUG [Consumer clientId=consumer-connect-cluster-2, groupId=connect-cluster] Sending FETCH request with header RequestHeader(apiKey=FETCH, apiVersion=13, clientId=consumer-connect-cluster-2, correlationId=3034) and timeout 30000 to node 0: FetchRequestData(clusterId=null, replicaId=-1, maxWaitMs=500, minBytes=1, maxBytes=52428800, isolationLevel=0, sessionId=619420322, sessionEpoch=1008, topics=[], forgottenTopicsData=[], rackId='') (org.apache.kafka.clients.NetworkClient:521)
[2022-05-10 08:14:18,812] DEBUG [Consumer clientId=consumer-connect-cluster-1, groupId=connect-cluster] Received FETCH response from node 2 for request with header RequestHeader(apiKey=FETCH, apiVersion=13, clientId=consumer-connect-cluster-1, correlationId=3032): FetchResponseData(throttleTimeMs=0, errorCode=0, sessionId=581764107, responses=[]) (org.apache.kafka.clients.NetworkClient:879)
[2022-05-10 08:14:18,813] DEBUG [Consumer clientId=consumer-connect-cluster-1, groupId=connect-cluster] Node 2 sent an incremental fetch response with throttleTimeMs = 0 for session 581764107 with 0 response partition(s), 8 implied partition(s) (org.apache.kafka.clients.FetchSessionHandler:584)
[2022-05-10 08:14:18,813] DEBUG [Consumer clientId=consumer-connect-cluster-1, groupId=connect-cluster] Added READ_UNCOMMITTED fetch request for partition connect-offsets-8 at position FetchPosition{offset=0, offsetEpoch=Optional.empty, currentLeader=LeaderAndEpoch{leader=Optional[<IP>156.202:9092 (id: 2 rack: null)], epoch=23}} to node <IP>156.202:9092 (id: 2 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:1245)
[2022-05-10 08:14:18,813] DEBUG [Consumer clientId=consumer-connect-cluster-1, groupId=connect-cluster] Added READ_UNCOMMITTED fetch request for partition connect-offsets-14 at position FetchPosition{offset=0, offsetEpoch=Optional.empty, currentLeader=LeaderAndEpoch{leader=Optional[<IP>156.202:9092 (id: 2 rack: null)], epoch=23}} to node <IP>156.202:9092 (id: 2 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:1245)
[2022-05-10 08:14:18,813] DEBUG [Consumer clientId=consumer-connect-cluster-1, groupId=connect-cluster] Added READ_UNCOMMITTED fetch request for partition connect-offsets-2 at position FetchPosition{offset=0, offsetEpoch=Optional.empty, currentLeader=LeaderAndEpoch{leader=Optional[<IP>156.202:9092 (id: 2 rack: null)], epoch=23}} to node <IP>156.202:9092 (id: 2 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:1245)
[2022-05-10 08:14:18,813] DEBUG [Consumer clientId=consumer-connect-cluster-1, groupId=connect-cluster] Added READ_UNCOMMITTED fetch request for partition connect-offsets-20 at position FetchPosition{offset=0, offsetEpoch=Optional.empty, currentLeader=LeaderAndEpoch{leader=Optional[<IP>156.202:9092 (id: 2 rack: null)], epoch=23}} to node <IP>156.202:9092 (id: 2 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:1245)
[2022-05-10 08:14:18,813] DEBUG [Consumer clientId=consumer-connect-cluster-1, groupId=connect-cluster] Added READ_UNCOMMITTED fetch request for partition connect-offsets-11 at position FetchPosition{offset=0, offsetEpoch=Optional.empty, currentLeader=LeaderAndEpoch{leader=Optional[<IP>156.202:9092 (id: 2 rack: null)], epoch=23}} to node <IP>156.202:9092 (id: 2 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:1245)
[2022-05-10 08:14:18,813] DEBUG [Consumer clientId=consumer-connect-cluster-1, groupId=connect-cluster] Added READ_UNCOMMITTED fetch request for partition connect-offsets-5 at position FetchPosition{offset=0, offsetEpoch=Optional.empty, currentLeader=LeaderAndEpoch{leader=Optional[<IP>156.202:9092 (id: 2 rack: null)], epoch=23}} to node <IP>156.202:9092 (id: 2 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:1245)
[2022-05-10 08:14:18,813] DEBUG [Consumer clientId=consumer-connect-cluster-1, groupId=connect-cluster] Added READ_UNCOMMITTED fetch request for partition connect-offsets-23 at position FetchPosition{offset=599, offsetEpoch=Optional[23], currentLeader=LeaderAndEpoch{leader=Optional[<IP>156.202:9092 (id: 2 rack: null)], epoch=23}} to node <IP>156.202:9092 (id: 2 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:1245)
[2022-05-10 08:14:18,813] DEBUG [Consumer clientId=consumer-connect-cluster-1, groupId=connect-cluster] Added READ_UNCOMMITTED fetch request for partition connect-offsets-17 at position FetchPosition{offset=70, offsetEpoch=Optional[23], currentLeader=LeaderAndEpoch{leader=Optional[<IP>156.202:9092 (id: 2 rack: null)], epoch=23}} to node <IP>156.202:9092 (id: 2 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:1245)
[2022-05-10 08:14:18,814] DEBUG [Consumer clientId=consumer-connect-cluster-1, groupId=connect-cluster] Built incremental fetch (sessionId=581764107, epoch=1006) for node 2. Added 0 partition(s), altered 0 partition(s), removed 0 partition(s), replaced 0 partition(s) out of 8 partition(s) (org.apache.kafka.clients.FetchSessionHandler:351)
[2022-05-10 08:14:18,814] DEBUG [Consumer clientId=consumer-connect-cluster-1, groupId=connect-cluster] Sending READ_UNCOMMITTED IncrementalFetchRequest(toSend=(), toForget=(), toReplace=(), implied=(connect-offsets-8, connect-offsets-14, connect-offsets-2, connect-offsets-20, connect-offsets-11, connect-offsets-5, connect-offsets-23, connect-offsets-17), canUseTopicIds=True) to broker <IP>156.202:9092 (id: 2 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:274)
[2022-05-10 08:14:18,814] DEBUG [Consumer clientId=consumer-connect-cluster-1, groupId=connect-cluster] Sending FETCH request with header RequestHeader(apiKey=FETCH, apiVersion=13, clientId=consumer-connect-cluster-1, correlationId=3035) and timeout 30000 to node 2: FetchRequestData(clusterId=null, replicaId=-1, maxWaitMs=500, minBytes=1, maxBytes=52428800, isolationLevel=0, sessionId=581764107, sessionEpoch=1006, topics=[], forgottenTopicsData=[], rackId='') (org.apache.kafka.clients.NetworkClient:521)
[2022-05-10 08:14:18,977] DEBUG [operation1|task-0] Job statistics (operation1, Modbus) number of requests: 354 (201 success, 43.2 % failed, 0.0 % too slow), min latency: 82.47 ms, mean latency: 93.20 ms, median: 89.56 ms (org.apache.plc4x.java.scraper.triggeredscraper.TriggeredScraperImpl:250)
[2022-05-10 08:14:19,073] DEBUG [Consumer clientId=consumer-connect-cluster-2, groupId=connect-cluster] Received FETCH response from node 2 for request with header RequestHeader(apiKey=FETCH, apiVersion=13, clientId=consumer-connect-cluster-2, correlationId=3032): FetchResponseData(throttleTimeMs=0, errorCode=0, sessionId=1118973913, responses=[]) (org.apache.kafka.clients.NetworkClient:879)
[2022-05-10 08:14:19,073] DEBUG [Consumer clientId=consumer-connect-cluster-2, groupId=connect-cluster] Node 2 sent an incremental fetch response with throttleTimeMs = 0 for session 1118973913 with 0 response partition(s), 2 implied partition(s) (org.apache.kafka.clients.FetchSessionHandler:584)
[2022-05-10 08:14:19,073] DEBUG [Consumer clientId=consumer-connect-cluster-2, groupId=connect-cluster] Added READ_UNCOMMITTED fetch request for partition connect-status-4 at position FetchPosition{offset=85, offsetEpoch=Optional[23], currentLeader=LeaderAndEpoch{leader=Optional[<IP>156.202:9092 (id: 2 rack: null)], epoch=23}} to node <IP>156.202:9092 (id: 2 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:1245)
[2022-05-10 08:14:19,073] DEBUG [Consumer clientId=consumer-connect-cluster-2, groupId=connect-cluster] Added READ_UNCOMMITTED fetch request for partition connect-status-1 at position FetchPosition{offset=115, offsetEpoch=Optional[23], currentLeader=LeaderAndEpoch{leader=Optional[<IP>156.202:9092 (id: 2 rack: null)], epoch=23}} to node <IP>156.202:9092 (id: 2 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:1245)
[2022-05-10 08:14:19,074] DEBUG [Consumer clientId=consumer-connect-cluster-2, groupId=connect-cluster] Built incremental fetch (sessionId=1118973913, epoch=1008) for node 2. Added 0 partition(s), altered 0 partition(s), removed 0 partition(s), replaced 0 partition(s) out of 2 partition(s) (org.apache.kafka.clients.FetchSessionHandler:351)
[2022-05-10 08:14:19,074] DEBUG [Consumer clientId=consumer-connect-cluster-2, groupId=connect-cluster] Sending READ_UNCOMMITTED IncrementalFetchRequest(toSend=(), toForget=(), toReplace=(), implied=(connect-status-1, connect-status-4), canUseTopicIds=True) to broker <IP>156.202:9092 (id: 2 rack: null) (org.apache.kafka.clients.consumer.internals.Fetcher:274)
[2022-05-10 08:14:19,074] DEBUG [Consumer clientId=consumer-connect-cluster-2, groupId=connect-cluster] Sending FETCH request with header RequestHeader(apiKey=FETCH, apiVersion=13, clientId=consumer-connect-cluster-2, correlationId=3035) and timeout 30000 to node 2: FetchRequestData(clusterId=null, replicaId=-1, maxWaitMs=500, minBytes=1, maxBytes=52428800, isolationLevel=0, sessionId=1118973913, sessionEpoch=1008, topics=[], forgottenTopicsData=[], rackId='') (org.apache.kafka.clients.NetworkClient:521)
[2022-05-10 08:14:19,126] DEBUG [Consumer clientId=consumer-connect-cluster-1, groupId=connect-cluster] Received FETCH response from node 0 for request with header RequestHeader(apiKey=FETCH, apiVersion=13, clientId=consumer-connect-cluster-1, correlationId=3033): FetchResponseData(throttleTimeMs=0, errorCode=0, sessionId=407599491, responses=[]) (org.apache.kafka.clients.NetworkClient:879)
[2022-05-10 08:14:19,126] DEBUG [Consumer clientId=consumer-connect-cluster-1, groupId=connect-cluster] Node 0 sent an incremental fetch response with throttleTimeMs = 0 for session 407599491 with 0 response partition(s), 8 implied partition(s) (org.apache.kafka.clients.FetchSessionHandler:584)

This seems to have been an issue with how the PLC4X connector handles errors. It was causing the connector to stop requesting new messages from the Modbus server after a timeout occurred. However what was interesting was that if the TCP connection to the Modbus server was interrupted, the PLC4X connector would reconnect and start polling again.
Can you please try building the latest PLC4X connector from the PLC4X Github repo a fix has been pushed to it?
PLC4X Kafka Connector Repository
The PLC4X Kafka Connector doesn't fail the Kafka connector on a failed Kafka Connector->PLC connection. Instead it waits for the connection to be restored and begins polling again.
From your comments it would also seem that you have a Modbus server available on a public IP address. This isn't the best design as Modbus provides no security.

log4j cannot write log in kafka consumer

I need to write logs in a kafka consummer but i obtain this error :
2020-03-22 22:22:20 DEBUG [Producer clientId=producer-1] Starting Kafka producer I/O thread.
2020-03-22 22:22:20 DEBUG [Producer clientId=producer-1] Initialize connection to node localhost:9092
(id: -1 rack: null) for sending metadata request
2020-03-22 22:22:20 DEBUG [Producer clientId=producer-1] Initiating connection to node localhost:9092
(id: -1 rack: null) using address localhost/127.0.0.1
log4j.properties :
log4j.logger.logGen=TRACE, Kafka
log4j.appender.Kafka=org.apache.kafka.log4jappender.KafkaLog4jAppender
log4j.appender.Kafka.topic=kafka
log4j.appender.Kafka.brokerList=localhost:9092
log4j.appender.Kafka.layout=org.apache.log4j.PatternLayout
log4j.appender.Kafka.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %m%n
KafkaClass.scala
import org.apache.log4j._
object KafkaClass extends App {
val logger = Logger.getLogger(this.getClass.getName)
logger.info("kafka info")
logger.error("kafka error")
logger.warn("kafka warn")
}
I don't see what is the problem, thank you for you help
Update :
I have this message console :
2020-03-24 14:27:17 DEBUG [Producer clientId=producer-1] Starting Kafka producer I/O thread.
2020-03-24 14:27:17 DEBUG [Producer clientId=producer-1] Initialize connection to node localhost:9092 (id: -1 rack: null) for sending metadata request
2020-03-24 14:27:17 DEBUG [Producer clientId=producer-1] Initiating connection to node localhost:9092 (id: -1 rack: null) using address localhost/127.0.0.1
2020-03-24 14:27:17 DEBUG Added sensor with name node--1.bytes-sent
2020-03-24 14:27:17 DEBUG Added sensor with name node--1.bytes-received
2020-03-24 14:27:17 DEBUG Added sensor with name node--1.latency
2020-03-24 14:27:17 DEBUG [Producer clientId=producer-1] Created socket with SO_RCVBUF = 32768, SO_SNDBUF = 131072, SO_TIMEOUT = 0 to node -1
but still don't receive message in the consumer

Read Docker Kafka messages populated by debezium postgres connect

I am using the Debezium Postgres connector. I have two tables in Postgres named 'publications' and 'comments'. kafka and zookeeper are running in docker containers as per the standard examples. The postgres is running locally. After using the debezium postgres connect, I have the following topics :
$ bin/kafka-topics.sh --list --zookeeper localhost:2181
__consumer_offsets
dbserver1.public.comments
dbserver1.public.publications
my_connect_configs
my_connect_offsets
my_connect_statuses
I would like to see a list of messages in the topic:
$ bin/kafka-console-consumer.sh --bootstrap-server kafka:9092 --topic dbserver1.public.publications
[2019-06-03 21:55:16,180] WARN [Consumer clientId=consumer-1,
groupId=console-consumer-5221] Connection to node -1
(kafka/23.202.231.166:9092) could not be established. Broker may not
be available. (org.apache.kafka.clients.NetworkClient) [2019-06-03
21:55:16,289] WARN [Consumer clientId=consumer-1,
groupId=console-consumer-5221] Connection to node -1
(kafka/23.202.231.166:9092) could not be established. Broker may not
be available. (org.apache.kafka.clients.NetworkClient) [2019-06-03
21:55:16,443] WARN [Consumer clientId=consumer-1,
groupId=console-consumer-5221] Connection to node -1
(kafka/23.202.231.166:9092) could not be established. Broker may not
be available. (org.apache.kafka.clients.NetworkClient) [2019-06-03
21:55:16,721] WARN [Consumer clientId=consumer-1,
groupId=console-consumer-5221] Connection to node -1
(kafka/23.202.231.166:9092) could not be established. Broker may not
be available. (org.apache.kafka.clients.NetworkClient) [2019-06-03
21:55:17,145] WARN [Consumer clientId=consumer-1,
groupId=console-consumer-5221] Connection to node -1
(kafka/23.202.231.166:9092) could not be established. Broker may not
be available. (org.apache.kafka.clients.NetworkClient) [2019-06-03
21:55:18,017] WARN [Consumer clientId=consumer-1,
groupId=console-consumer-5221] Connection to node -1
(kafka/23.202.231.166:9092) could not be established. Broker may not
be available. (org.apache.kafka.clients.NetworkClient) ^CProcessed a
total of 0 messages
$ bin/kafka-console-consumer.sh --bootstrap-server localhost:9092
--topic dbserver1.public.publications
[2019-06-03 21:55:16,180] WARN [Consumer clientId=consumer-1,
groupId=console-consumer-5221] Connection to node -1
(kafka/23.202.231.166:9092) could not be established. Broker may not
be available. (org.apache.kafka.clients.NetworkClient)
How do I specify the correct value for bootstrap-server? Thanks.

I am assuming you are trying to connect to kafka broker from an external server.
Since you have already mentioned your Kafka and Zookeeper instances are running from docker images. You need to identify your docker images external port corresponding to 9092 as well as its external IP address and you have to those along with --bootstrap-server parameter while executing command kafka-console-consumer.sh

If you are running the kafka-console-consumer.sh outside of docker then you should use localhost hostname. If inside the Docker container then make sure it is in container that sees kafka hostname.

Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)

I have installed Kafka and doing some basic testing. I am able to create topics using scripts provided under Kafka-broker/bin folder.
But when I am trying to produce message getting below WARNing every time I run this. And no message is getting generated. Please advice.
[root#node2 bin]# ./kafka-console-producer.sh --broker-list localhost:9092 --topic test_master
>testmsg1
[2019-05-15 06:25:19,092] WARN [Producer clientId=console-producer] Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
[2019-05-15 06:25:19,197] WARN [Producer clientId=console-producer] Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
[2019-05-15 06:25:19,349] WARN [Producer clientId=console-producer] Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
[2019-05-15 06:25:19,562] WARN [Producer clientId=console-producer] Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
[2019-05-15 06:25:20,017] WARN [Producer clientId=console-producer] Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
[2019-05-15 06:25:20,876] WARN [Producer clientId=console-producer] Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
[2019-05-15 06:25:21,987] WARN [Producer clientId=console-producer] Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
[2019-05-15 06:25:22,957] WARN [Producer clientId=console-producer] Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
[2019-05-15 06:25:23,818] WARN [Producer clientId=console-producer] Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
^Corg.apache.kafka.common.KafkaException: Producer closed while send in progress
at org.apache.kafka.clients.producer.KafkaProducer.doSend(KafkaProducer.java:826)
at org.apache.kafka.clients.producer.KafkaProducer.send(KafkaProducer.java:803)
at kafka.tools.ConsoleProducer$.send(ConsoleProducer.scala:75)
at kafka.tools.ConsoleProducer$.main(ConsoleProducer.scala:57)
at kafka.tools.ConsoleProducer.main(ConsoleProducer.scala)
Caused by: org.apache.kafka.common.KafkaException: Requested metadata update after close
at org.apache.kafka.clients.Metadata.awaitUpdate(Metadata.java:188)
at org.apache.kafka.clients.producer.KafkaProducer.waitOnMetadata(KafkaProducer.java:938)
at org.apache.kafka.clients.producer.KafkaProducer.doSend(KafkaProducer.java:823)
... 4 more

Open Server.xml of each broker of your cluster and make following changes
Change the listeners=PLAINTEXT://:9092 to listeners=PLAINTEXT://<our ip address>:9092

Just remove your local host and write the port
EXAMPLE:
{--broker-list 172.0.0.1:9092} will be changed to { --broker-list :9092 }

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