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https://issues.apache.org/jira/browse/CASSANDRA-21186?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18060466#comment-18060466
]
Dmitry Konstantinov commented on CASSANDRA-21186:
-------------------------------------------------
The first OOM-related error in the test log (
[^TEST-org.apache.cassandra.index.accord.RouteIndexTest.log.xz] ):
{code}
ERROR [MemtableFlushWriter:1] 2026-02-21T00:42:12,558 OutOfMemory error letting
the JVM handle the error:
java.lang.OutOfMemoryError: Java heap space
at
org.apache.cassandra.utils.streamhist.StreamingTombstoneHistogramBuilder$Spool.<init>(StreamingTombstoneHistogramBuilder.java:433)
at
org.apache.cassandra.utils.streamhist.StreamingTombstoneHistogramBuilder.<init>(StreamingTombstoneHistogramBuilder.java:86)
at
org.apache.cassandra.io.sstable.metadata.MetadataCollector.<init>(MetadataCollector.java:122)
at
org.apache.cassandra.io.sstable.metadata.MetadataCollector.<init>(MetadataCollector.java:165)
at
org.apache.cassandra.io.sstable.SimpleSSTableMultiWriter.create(SimpleSSTableMultiWriter.java:128)
at
org.apache.cassandra.db.compaction.AbstractCompactionStrategy.createSSTableMultiWriter(AbstractCompactionStrategy.java:569)
at
org.apache.cassandra.db.compaction.CompactionStrategyHolder.createSSTableMultiWriter(CompactionStrategyHolder.java:249)
at
org.apache.cassandra.db.compaction.CompactionStrategyManager.createSSTableMultiWriter(CompactionStrategyManager.java:1425)
at
org.apache.cassandra.db.ColumnFamilyStore.createSSTableMultiWriter(ColumnFamilyStore.java:689)
at
org.apache.cassandra.db.ColumnFamilyStore.createSSTableMultiWriter(ColumnFamilyStore.java:684)
at
org.apache.cassandra.db.memtable.Flushing.createFlushWriter(Flushing.java:242)
at
org.apache.cassandra.db.memtable.Flushing.flushRunnable(Flushing.java:117)
at
org.apache.cassandra.db.memtable.Flushing.flushRunnables(Flushing.java:87)
at
org.apache.cassandra.db.ColumnFamilyStore$Flush.flushMemtable(ColumnFamilyStore.java:1334)
at
org.apache.cassandra.db.ColumnFamilyStore$Flush.run(ColumnFamilyStore.java:1289)
at
org.apache.cassandra.concurrent.ExecutionFailure$1.run(ExecutionFailure.java:138)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.base/java.lang.Thread.run(Thread.java:829)
{code}
> Test failure: org.apache.cassandra.index.accord.RouteIndexTest
> --------------------------------------------------------------
>
> Key: CASSANDRA-21186
> URL: https://issues.apache.org/jira/browse/CASSANDRA-21186
> Project: Apache Cassandra
> Issue Type: Bug
> Components: Test/dtest/java
> Reporter: Dmitry Konstantinov
> Assignee: Dmitry Konstantinov
> Priority: Normal
> Fix For: 5.x
>
> Attachments: RouteIndexTest_thread_dump.txt,
> TEST-org.apache.cassandra.index.accord.RouteIndexTest.log.xz
>
>
> The test is almost always fail now on the main CI, last example:
> https://ci-cassandra.apache.org/job/Cassandra-trunk/2410/#showFailuresLink
> It happens for different JDKs and configurations (compression, cdc, oa)
> Usually it fails with a JUnit test timeout:
> {code}
> Timeout occurred. Please note the time in the report does not reflect the
> time until the timeout.
> {code}
> Thanks to CASSANDRA-21172 we can see now a thread dump (
> [^RouteIndexTest_thread_dump.txt] ) to clarify where did we stuck.
> https://ci-cassandra.apache.org/job/Cassandra-trunk/2410/cloudbees-pipeline-explorer/?line=450882
> test-cdc jdk11 3/20
> we can observe Java OOM as well as the stuck main thread:
> {code}
> [junit-timeout] "main" #1 prio=5 os_prio=0 cpu=9993.84ms elapsed=480.27s
> tid=0x00007fc3e401f000 nid=0xf44 waiting on condition [0x00007fc3eabd0000]
> [junit-timeout] java.lang.Thread.State: WAITING (parking)
> [junit-timeout] at
> jdk.internal.misc.Unsafe.park([email protected]/Native Method)
> [junit-timeout] at
> java.util.concurrent.locks.LockSupport.park([email protected]/LockSupport.java:323)
> [junit-timeout] at
> org.apache.cassandra.utils.concurrent.WaitQueue$Standard$AbstractSignal.await(WaitQueue.java:322)
> [junit-timeout] at
> org.apache.cassandra.utils.concurrent.WaitQueue$Standard$AbstractSignal.await(WaitQueue.java:300)
> [junit-timeout] at
> org.apache.cassandra.utils.concurrent.Awaitable$AsyncAwaitable.await(Awaitable.java:306)
> [junit-timeout] at
> org.apache.cassandra.utils.concurrent.Awaitable$AsyncAwaitable.await(Awaitable.java:338)
> [junit-timeout] at
> org.apache.cassandra.utils.concurrent.Awaitable$Defaults.awaitThrowUncheckedOnInterrupt(Awaitable.java:131)
> [junit-timeout] at
> org.apache.cassandra.utils.concurrent.Awaitable$AbstractAwaitable.awaitThrowUncheckedOnInterrupt(Awaitable.java:235)
> [junit-timeout] at
> org.apache.cassandra.tcm.log.LocalLog$Async.runOnce(LocalLog.java:760)
> [junit-timeout] at
> org.apache.cassandra.tcm.log.LocalLog$Async$AwaitCommit.get(LocalLog.java:868)
> [junit-timeout] at
> org.apache.cassandra.tcm.log.LocalLog$Async$AwaitCommit.get(LocalLog.java:860)
> [junit-timeout] at
> org.apache.cassandra.tcm.log.LocalLog$Async.awaitAtLeast(LocalLog.java:709)
> [junit-timeout] at
> org.apache.cassandra.tcm.AbstractLocalProcessor.commit(AbstractLocalProcessor.java:106)
> [junit-timeout] at
> org.apache.cassandra.tcm.ClusterMetadataService$SwitchableProcessor.commit(ClusterMetadataService.java:973)
> [junit-timeout] at
> org.apache.cassandra.tcm.Processor.commit(Processor.java:50)
> [junit-timeout] at
> org.apache.cassandra.tcm.ClusterMetadataService.commit(ClusterMetadataService.java:613)
> [junit-timeout] at
> org.apache.cassandra.tcm.ClusterMetadataService.commit(ClusterMetadataService.java:578)
> [junit-timeout] at
> org.apache.cassandra.ServerTestUtils$ResettableClusterMetadataService.reset(ServerTestUtils.java:385)
> [junit-timeout] at
> org.apache.cassandra.ServerTestUtils.resetCMS(ServerTestUtils.java:357)
> [junit-timeout] at
> org.apache.cassandra.cql3.CQLTester.afterTest(CQLTester.java:534)
> {code}
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