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Posted to hdfs-issues@hadoop.apache.org by "Xiaoqiao He (Jira)" <ji...@apache.org> on 2022/06/17 14:08:00 UTC
[jira] [Resolved] (HDFS-16600) Fix deadlock of fine-grain lock for FsDatastImpl of DataNode.
[ https://issues.apache.org/jira/browse/HDFS-16600?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Xiaoqiao He resolved HDFS-16600.
--------------------------------
Fix Version/s: 3.4.0
Hadoop Flags: Reviewed
Resolution: Fixed
Committed to trunk. Thanks [~xuzq_zander] for your works!
> Fix deadlock of fine-grain lock for FsDatastImpl of DataNode.
> -------------------------------------------------------------
>
> Key: HDFS-16600
> URL: https://issues.apache.org/jira/browse/HDFS-16600
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: ZanderXu
> Assignee: ZanderXu
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.4.0
>
> Time Spent: 5h
> Remaining Estimate: 0h
>
> The UT org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.testSynchronousEviction failed, because happened deadlock, which is introduced by [HDFS-16534|https://issues.apache.org/jira/browse/HDFS-16534].
> DeadLock:
> {code:java}
> // org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.createRbw line 1588 need a read lock
> try (AutoCloseableLock lock = lockManager.readLock(LockLevel.BLOCK_POOl,
> b.getBlockPoolId()))
> // org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.evictBlocks line 3526 need a write lock
> try (AutoCloseableLock lock = lockManager.writeLock(LockLevel.BLOCK_POOl, bpid))
> {code}
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