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https://issues.apache.org/jira/browse/IMPALA-7670?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16644083#comment-16644083
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bharath v commented on IMPALA-7670:
-----------------------------------
[~parna] Did you reproduce this after the first time we saw the issue?
[~tianyiwang] I'll let Parna chime in here.
> Drop table with a concurrent refresh throws ConcurrentModificationException
> ---------------------------------------------------------------------------
>
> Key: IMPALA-7670
> URL: https://issues.apache.org/jira/browse/IMPALA-7670
> Project: IMPALA
> Issue Type: Bug
> Components: Catalog
> Affects Versions: Impala 3.1.0
> Reporter: bharath v
> Assignee: Tianyi Wang
> Priority: Major
>
> * This is a Catalog V2 only bug*.
> Saw this in the Catalog server.
> {noformat}
> I1004 16:38:55.236702 85380 jni-util.cc:308]
> java.util.ConcurrentModificationException
> at java.util.HashMap$HashIterator.nextNode(HashMap.java:1442)
> at java.util.HashMap$ValueIterator.next(HashMap.java:1471)
> at
> org.apache.impala.catalog.FeFsTable$Utils.getPartitionFromThriftPartitionSpec(FeFsTable.java:407)
> at
> org.apache.impala.catalog.HdfsTable.getPartitionFromThriftPartitionSpec(HdfsTable.java:694)
> at
> org.apache.impala.catalog.Catalog.getHdfsPartition(Catalog.java:407)
> at
> org.apache.impala.catalog.Catalog.getHdfsPartition(Catalog.java:386)
> at
> org.apache.impala.service.CatalogOpExecutor.bulkAlterPartitions(CatalogOpExecutor.java:3193)
> at
> org.apache.impala.service.CatalogOpExecutor.dropTableStats(CatalogOpExecutor.java:1255)
> at
> org.apache.impala.service.CatalogOpExecutor.dropStats(CatalogOpExecutor.java:1148)
> at
> org.apache.impala.service.CatalogOpExecutor.execDdlRequest(CatalogOpExecutor.java:301)
> at org.apache.impala.service.JniCatalog.execDdl(JniCatalog.java:157)
> {noformat}
> Still need to dig into it, but seems like something is off with locking
> somewhere.
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