Http source configuration doesn't work for flume - apache-kafka

Question

Iam a beginner to Apache flume. Iam trying to pull data from a REST API and take it through flume and send to a kafka topic. But it is not working so far. The configuration I tried to use is shown below.There is a test GET API at localhost:8080/kafka/publish/ in the system. Iam trying to get data from this. The below configuration I tried pulling from flume documentation.
a1.sources = r1
a1.channels = c1
a1.sources.r1.type = http
a1.sources.r1.port = 8080
a1.sources.r1.channels = c1
a1.sources.r1.handler = org.apache.flume.source.http.JSONHandler
a1.sources.r1.handler.nickname = random props
a1.sources.r1.HttpConfiguration.sendServerVersion = false
a1.sources.r1.ServerConnector.idleTimeout = 300
a1.sinks.k1.channel = c1
a1.sinks.k1.type = org.apache.flume.sink.kafka.KafkaSink
a1.sinks.k1.kafka.topic = simple
a1.sinks.k1.kafka.bootstrap.servers = localhost:9092
a1.sinks.k1.kafka.flumeBatchSize = 20
a1.sinks.k1.kafka.producer.acks = 1
a1.sinks.k1.kafka.producer.linger.ms = 1
a1.sinks.k1.kafka.producer.compression.type = snappy
Can anyone help me solve this. What is the problem here?
The logs is added below
2020-12-03 11:16:17,696 (conf-file-poller-0) [WARN - org.apache.flume.conf.FlumeConfiguration$AgentConfiguration.validateConfigFilterSet(FlumeConfiguration.java:623)] Agent configuration for 'a1' has no configfilters.
2020-12-03 11:16:17,713 (conf-file-poller-0) [WARN - org.apache.flume.conf.FlumeConfiguration$AgentConfiguration.isValid(FlumeConfiguration.java:373)] Agent configuration for 'a1' does not contain any valid channels. Marking it as invalid.
2020-12-03 11:16:17,714 (conf-file-poller-0) [WARN - org.apache.flume.conf.FlumeConfiguration.validateConfiguration(FlumeConfiguration.java:154)] Agent configuration invalid for agent 'a1'. It will be removed.
2020-12-03 11:16:17,715 (conf-file-poller-0) [INFO - org.apache.flume.conf.FlumeConfiguration.validateConfiguration(FlumeConfiguration.java:163)] Post-validation flume configuration contains configuration for agents: []
2020-12-03 11:16:17,718 (conf-file-poller-0) [WARN - org.apache.flume.node.AbstractConfigurationProvider.getConfiguration(AbstractConfigurationProvider.java:139)] No configuration found for this host:a1
2020-12-03 11:16:17,730 (conf-file-poller-0) [INFO - org.apache.flume.node.Application.startAllComponents(Application.java:162)] Starting new configuration:{ sourceRunners:{} sinkRunners:{} channels:{} }