[KYLIN-3508] kylin cube kafka streaming lz4 exception

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: v2.4.0
• Fix Version/s: v2.4.0
• Component/s: NRT Streaming
• Environment: hadoop 2.7.2 ; hbase 1.2.5 ; hive 1.2.2 ; kylin-2.4.0-bin-hbase1x ; kafka_2.10-0.10.2.2 ; centos 7
• Assignee: Unassigned
• Reporter: chenwen
• Created: 23/Aug/18 03:25
• Updated: 24/Aug/18 08:47
• Resolved: 24/Aug/18 08:46

Description

I have a kafka topic using lz4 compression algorithm, then I created a cube in kylin to consume this topic, it will report the following error, is my configuration wrong? I switched to the other algorithm gzip, and snappy works fine.

Error: java.lang.ClassNotFoundException: net.jpountz.lz4.LZ4Exception at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:264) at org.apache.kafka.common.record.MemoryRecordsBuilder$4.get(MemoryRecordsBuilder.java:82) at org.apache.kafka.common.record.MemoryRecordsBuilder$MemoizingConstructorSupplier.get(MemoryRecordsBuilder.java:489) at org.apache.kafka.common.record.MemoryRecordsBuilder.wrapForInput(MemoryRecordsBuilder.java:455) at org.apache.kafka.common.record.RecordsIterator$DeepRecordsIterator.<init>(RecordsIterator.java:157) at org.apache.kafka.common.record.RecordsIterator.makeNext(RecordsIterator.java:81) at org.apache.kafka.common.record.RecordsIterator.makeNext(RecordsIterator.java:33) at org.apache.kafka.common.utils.AbstractIterator.maybeComputeNext(AbstractIterator.java:79) at org.apache.kafka.common.utils.AbstractIterator.hasNext(AbstractIterator.java:45) at org.apache.kafka.clients.consumer.internals.Fetcher.parseCompletedFetch(Fetcher.java:787) at org.apache.kafka.clients.consumer.internals.Fetcher.fetchedRecords(Fetcher.java:482) at org.apache.kafka.clients.consumer.KafkaConsumer.pollOnce(KafkaConsumer.java:1062) at org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:996) at org.apache.kylin.source.kafka.hadoop.KafkaInputRecordReader.nextKeyValue(KafkaInputRecordReader.java:119) at org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.nextKeyValue(MapTask.java:556) at org.apache.hadoop.mapreduce.task.MapContextImpl.nextKeyValue(MapContextImpl.java:80) at org.apache.hadoop.mapreduce.lib.map.WrappedMapper$Context.nextKeyValue(WrappedMapper.java:91) at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:145) at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:787) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341) at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:164) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:422) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657) at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158) Container killed by the ApplicationMaster. Container killed on request. Exit code is 143 Container exited with a non-zero exit code 143