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https://issues.apache.org/jira/browse/APEXMALHAR-2134?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15438593#comment-15438593
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ASF GitHub Bot commented on APEXMALHAR-2134:
--------------------------------------------
Github user chaithu14 closed the pull request at:
https://github.com/apache/apex-malhar/pull/379
> Catch NullPointerException if some Kafka partition has no leader broker
> -----------------------------------------------------------------------
>
> Key: APEXMALHAR-2134
> URL: https://issues.apache.org/jira/browse/APEXMALHAR-2134
> Project: Apache Apex Malhar
> Issue Type: Bug
> Reporter: Siyuan Hua
> Assignee: Chaitanya
> Labels: newbie
> Fix For: 3.5.0
>
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> Kafka partition could have no leader broker some time and we need to catch
> exception and skip that partition for the time until new leader is elected
> Here is the exception we see in the stacktrace
> 2016-07-05 14:00:46,087 ERROR kafka.SimpleKafkaConsumer
> (SimpleKafkaConsumer.java:run(481)) - Exception {}
> java.lang.NullPointerException
> at java.util.concurrent.ConcurrentHashMap.putVal(ConcurrentHashMap.java:1011)
> at java.util.concurrent.ConcurrentHashMap.put(ConcurrentHashMap.java:1006)
> at
> com.datatorrent.contrib.kafka.SimpleKafkaConsumer$MetaDataMonitorTask.monitorMetadata(SimpleKafkaConsumer.java:511)
> at
> com.datatorrent.contrib.kafka.SimpleKafkaConsumer$MetaDataMonitorTask.run(SimpleKafkaConsumer.java:477)
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> 2016-07-05 14:01:15,999 ERROR kafka.SimpleKafkaConsumer
> (SimpleKafkaConsumer.java:run(481)) - Exception {}
> java.lang.NullPointerException
> at java.util.concurrent.ConcurrentHashMap.putVal(ConcurrentHashMap.java:1011)
> at java.util.concurrent.ConcurrentHashMap.put(ConcurrentHashMap.java:1006)
> at
> com.datatorrent.contrib.kafka.SimpleKafkaConsumer$MetaDataMonitorTask.monitorMetadata(SimpleKafkaConsumer.java:511)
> at
> com.datatorrent.contrib.kafka.SimpleKafkaConsumer$MetaDataMonitorTask.run(SimpleKafkaConsumer.java:477)
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
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