Segment cache is not getting created in druid - druid

Question

I am submitting a ingestion task in druid. The task is getting completed successfully and segments are created in the hdfs.
Previously with the same config, the segment cache was getting updated.
However the druid- segment cache is not getting updated with the segments of the new datasource.
I have checked and found that all the druid services are up and running.
Below is the exception, which is getting logged.
io.druid.query.lookup.LookupReferencesManager.start()] on object[io.druid.query.lookup.LookupReferencesManager#7336fd8f].
INFO [main] io.druid.query.lookup.LookupReferencesManager - LookupReferencesManager is starting.
ERROR [main] io.druid.curator.discovery.ServerDiscoverySelector - No server instance found for [druid/coordinator]
INFO [NodeTypeWatcher[coordinator]] io.druid.curator.discovery.CuratorDruidNodeDiscoveryProvider$NodeTypeWatcher - Received INITIALIZED in node watcher for type [coordinator].
WARN [main] io.druid.java.util.common.RetryUtils - Failed on try 1, retrying in 1,481ms.
io.druid.java.util.common.IOE: No known server
at io.druid.discovery.DruidLeaderClient.getCurrentKnownLeader(DruidLeaderClient.java:276) ~[druid-server-0.12.2.jar:0.12.2]
at io.druid.discovery.DruidLeaderClient.makeRequest(DruidLeaderClient.java:128) ~[druid-server-0.12.2.jar:0.12.2]
at io.druid.query.lookup.LookupReferencesManager.fetchLookupsForTier(LookupReferencesManager.java:569) ~[druid-server-0.12.2.jar:0.12.2]
at io.druid.query.lookup.LookupReferencesManager.tryGetLookupListFromCoordinator(LookupReferencesManager.java:420) ~[druid-server-0.12.2.jar:0.12.2]
at io.druid.query.lookup.LookupReferencesManager.lambda$getLookupListFromCoordinator$4(LookupReferencesManager.java:398) ~[druid-server-0.12.2.jar:0.12.2]
at io.druid.java.util.common.RetryUtils.retry(RetryUtils.java:63) [java-util-0.12.2.jar:0.12.2]
at io.druid.java.util.common.RetryUtils.retry(RetryUtils.java:81) [java-util-0.12.2.jar:0.12.2]
at io.druid.query.lookup.LookupReferencesManager.getLookupListFromCoordinator(LookupReferencesManager.java:388) [druid-server-0.12.2.jar:0.12.2]
at io.druid.query.lookup.LookupReferencesManager.getLookupsList(LookupReferencesManager.java:365) [druid-server-0.12.2.jar:0.12.2]
at io.druid.query.lookup.LookupReferencesManager.loadAllLookupsAndInitStateRef(LookupReferencesManager.java:348) [druid-server-0.12.2.jar:0.12.2]
at io.druid.query.lookup.LookupReferencesManager.start(LookupReferencesManager.java:153) [druid-server-0.12.2.jar:0.12.2]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_162]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_162]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_162]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_162]
at io.druid.java.util.common.lifecycle.Lifecycle$AnnotationBasedHandler.start(Lifecycle.java:413) [java-util-0.12.2.jar:0.12.2]
at io.druid.java.util.common.lifecycle.Lifecycle.start(Lifecycle.java:311) [java-util-0.12.2.jar:0.12.2]
at io.druid.guice.LifecycleModule$2.start(LifecycleModule.java:134) [druid-api-0.12.2.jar:0.12.2]
at io.druid.cli.GuiceRunnable.initLifecycle(GuiceRunnable.java:101) [druid-services-0.12.2.jar:0.12.2]
at io.druid.cli.CliPeon.run(CliPeon.java:301) [druid-services-0.12.2.jar:0.12.2]
at io.druid.cli.Main.main(Main.java:116) [druid-services-0.12.2.jar:0.12.2]
ERROR [main] io.druid.curator.discovery.ServerDiscoverySelector - No server instance found for [druid/coordinator]

Answer 1

You can check whether the following properties are configured or not:
hive.druid.broker.address.default : MyIP:8082
hive.druid.coordinator.address.default : MyIP:8081
hive.druid.http.numConnection: 20
hive.druid.http.read.timeout: PT10M
hive.druid.indexer.memory.rownum.max: 75000
hive.druid.indexer.partition.size.max: 1000000
hive.druid.indexer.segments.granularity: DAY
hive.druid.metadata.base: druid
hive.druid.metadata.db.type: mysql
hive.druid.metadata.password: druid
hive.druid.metadata.uri: jdbc:mysql://MyIP:3306/druid
hive.druid.metadata.username: druid
hive.druid.storage.storageDirectory: /apps/hive/warehouse
hive.druid.working.directory: /tmp/druid-indexing