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https://issues.apache.org/jira/browse/KAFKA-9293?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16993964#comment-16993964
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ASF GitHub Bot commented on KAFKA-9293:
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hachikuji commented on pull request #7820: KAFKA-9293; Fix NPE in
DumpLogSegments offsets parser and display tombstone keys
URL: https://github.com/apache/kafka/pull/7820
Fixes an NPE when UserData in a member's subscription is null. Also modifies
the output logic so that we show the keys of tombstones for both group and
transaction metadata. Also adds test cases.
### Committer Checklist (excluded from commit message)
- [ ] Verify design and implementation
- [ ] Verify test coverage and CI build status
- [ ] Verify documentation (including upgrade notes)
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> NPE in DumpLogSegments with --offsets-decoder
> ---------------------------------------------
>
> Key: KAFKA-9293
> URL: https://issues.apache.org/jira/browse/KAFKA-9293
> Project: Kafka
> Issue Type: Bug
> Reporter: Jason Gustafson
> Assignee: Jason Gustafson
> Priority: Major
>
> {code}
> Exception in thread "main" java.lang.NullPointerException
> at org.apache.kafka.common.utils.Utils.toArray(Utils.java:230)
> at
> kafka.tools.DumpLogSegments$OffsetsMessageParser.$anonfun$parseGroupMetadata$2(DumpLogSegments.scala:287)
> at
> kafka.tools.DumpLogSegments$OffsetsMessageParser.parseGroupMetadata(DumpLogSegments.scala:284)
> at
> kafka.tools.DumpLogSegments$OffsetsMessageParser.parse(DumpLogSegments.scala:317)
> at
> kafka.tools.DumpLogSegments$.$anonfun$dumpLog$2(DumpLogSegments.scala:372)
> at
> kafka.tools.DumpLogSegments$.$anonfun$dumpLog$2$adapted(DumpLogSegments.scala:343)
> at scala.collection.Iterator.foreach(Iterator.scala:941)
> at scala.collection.Iterator.foreach$(Iterator.scala:941)
> at scala.collection.AbstractIterator.foreach(Iterator.scala:1429)
> at scala.collection.IterableLike.foreach(IterableLike.scala:74)
> at scala.collection.IterableLike.foreach$(IterableLike.scala:73)
> at scala.collection.AbstractIterable.foreach(Iterable.scala:56)
> at
> kafka.tools.DumpLogSegments$.$anonfun$dumpLog$1(DumpLogSegments.scala:343)
> at
> kafka.tools.DumpLogSegments$.$anonfun$dumpLog$1$adapted(DumpLogSegments.scala:340)
> at scala.collection.Iterator.foreach(Iterator.scala:941)
> at scala.collection.Iterator.foreach$(Iterator.scala:941)
> at scala.collection.AbstractIterator.foreach(Iterator.scala:1429)
> at scala.collection.IterableLike.foreach(IterableLike.scala:74)
> at scala.collection.IterableLike.foreach$(IterableLike.scala:73)
> at scala.collection.AbstractIterable.foreach(Iterable.scala:56)
> at kafka.tools.DumpLogSegments$.dumpLog(DumpLogSegments.scala:340)
> at
> kafka.tools.DumpLogSegments$.$anonfun$main$1(DumpLogSegments.scala:60)
> at kafka.tools.DumpLogSegments$.main(DumpLogSegments.scala:51)
> at kafka.tools.DumpLogSegments.main(DumpLogSegments.scala)
> {code}
> The problem is that "userData" is nullable, but the dump log tool doesn't
> check for null.
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