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Posted to hdfs-issues@hadoop.apache.org by "Nanda kumar (JIRA)" <ji...@apache.org> on 2018/10/15 14:39:00 UTC
[jira] [Created] (HDDS-661) When a volume fails in datanode
VersionEndpointTask#call ends up in dead lock.
Nanda kumar created HDDS-661:
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Summary: When a volume fails in datanode VersionEndpointTask#call ends up in dead lock.
Key: HDDS-661
URL: https://issues.apache.org/jira/browse/HDDS-661
Project: Hadoop Distributed Data Store
Issue Type: Bug
Components: Ozone Datanode
Reporter: Nanda kumar
When a volume fails the call to {{VersionEndpointTask#call}} ends up in dead lock.
org.apache.hadoop.ozone.container.common.states.endpoint.VersionEndpointTask.call(VersionEndpointTask.java:78) --> we acquire VolumeSet read lock here.
org.apache.hadoop.ozone.container.common.states.endpoint.VersionEndpointTask.call(VersionEndpointTask.java:93)
org.apache.hadoop.ozone.container.common.volume.VolumeSet.failVolume(VolumeSet.java:276)
org.apache.hadoop.ozone.container.common.volume.VolumeSet.writeLock(VolumeSet.java:210) ---> we wait for VolumeSet write lock.
Since this thread already holds the read lock, it cannot get the write lock and ends up in dead lock.
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