huaicui created FLUME-3358:
------------------------------
Summary: The kafka channel does not work properly when the
interceptor filters into an empty event queue
Key: FLUME-3358
URL: https://issues.apache.org/jira/browse/FLUME-3358
Project: Flume
Issue Type: Bug
Components: Kafka Channel
Affects Versions: 1.9.0
Reporter: huaicui
I have a requirement to stream and filter kafka topics according to the
business. Because the filter will cause list<Event> to be empty, the whole
pipeline will not work properly
logic like this:
String key = JsonPath.read(message, "$.key");
switch (key) {
case "test1":
return process(key, event);
case "test2":
return process(key, event);
case "test3":
return process(key, event);
default:
return null;
}
When all data of a queue will be filtered, this pipeline(kafka->hdfs) will
stay in an abnormal state.
This is my configuration:
# device flume
Test.sources = r1
Test.sinks = k1
Test.channels = c1
Test.sources.r1.type = org.apache.flume.source.kafka.KafkaSource
Test.sources.r1.kafka.bootstrap.servers = xxxx
Test.sources.r1.topic = xxx
Test.sources.r1.groupId = test_lab_1
Test.sources.r1.kafka.consumer.timeout.ms = 100
Test.sources.r1.interceptors = i1
Test.sources.r1.interceptors.i1.type =
com.cisco.wap.DeviceUsageDeserializerInterceptor$Builder. --- This is my custom
interceptor
# Describe the sink
Test.sinks.k1.type = hdfs
Test.sinks.k1.hdfs.path = /user/naming/%\{DeviceDir}
Test.sinks.k1.hdfs.filePrefix = device-
Test.sinks.k1.hdfs.fileSuffix = .csv
Test.sinks.k1.hdfs.inUseSuffix = .tmp
Test.sinks.k1.hdfs.idleTimeout = 120
Test.sinks.k1.hdfs.writeFormat = Text
Test.sinks.k1.hdfs.batchSize = 100
Test.sinks.k1.hdfs.threadsPoolSize = 10
Test.sinks.k1.hdfs.rollSize = 0
Test.sinks.k1.hdfs.rollCount = 0
# Use a channel which buffers events in memory
Test.channels.c1.type = memory
Test.channels.c1.capacity = 10000
Test.channels.c1.transactionCapacity = 1000
# Bind the source and sink to the channel
Test.sources.r1.channels = c1
Test.sinks.k1.channel = c1
this is exception:
!image-2020-03-04-19-13-16-068.png!
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
