xuzifu666 opened a new pull request, #7584:
URL: https://github.com/apache/paimon/pull/7584
### Purpose
ClusteringTableTest occasionally encountered a concurrency exception:
```
Error:
org.apache.paimon.separated.ClusteringTableTest.testStreamWriteFrequentCompactWithOverlappingKeys
Time elapsed: 0.509 s <<< ERROR!
java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextNode(HashMap.java:1469)
at java.util.HashMap$EntryIterator.next(HashMap.java:1503)
at java.util.HashMap$EntryIterator.next(HashMap.java:1501)
at
org.apache.paimon.deletionvectors.DeletionVectorIndexFileWriter.writeSingleFile(DeletionVectorIndexFileWriter.java:57)
at
org.apache.paimon.deletionvectors.DeletionVectorsIndexFile.writeSingleFile(DeletionVectorsIndexFile.java:144)
at
org.apache.paimon.deletionvectors.BucketedDvMaintainer.writeDeletionVectorsIndex(BucketedDvMaintainer.java:118)
at
org.apache.paimon.compact.CompactDeletionFile.generateFiles(CompactDeletionFile.java:44)
at
org.apache.paimon.compact.CompactDeletionFile$LazyCompactDeletionFile.getOrCompute(CompactDeletionFile.java:114)
at
org.apache.paimon.operation.AbstractFileStoreWrite.prepareCommit(AbstractFileStoreWrite.java:242)
at
org.apache.paimon.operation.MemoryFileStoreWrite.prepareCommit(MemoryFileStoreWrite.java:152)
at
org.apache.paimon.table.sink.TableWriteImpl.prepareCommit(TableWriteImpl.java:252)
at
org.apache.paimon.separated.ClusteringTableTest.testStreamWriteFrequentCompactWithOverlappingKeys(ClusteringTableTest.java:848)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at
org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:725)
at
org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
```
this pr aim to fix it.
### Tests
ClusteringTableTest.testStreamWriteFrequentCompactWithOverlappingKeys
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