[jira] [Updated] (CASSANDRA-15295) Running into deadlock when do CommitLog initialization
[ https://issues.apache.org/jira/browse/CASSANDRA-15295?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Jeff Jirsa updated CASSANDRA-15295: --- Test and Documentation Plan: Unspecified Status: Patch Available (was: Open) PR from reporter at https://github.com/apache/cassandra/pull/347 > Running into deadlock when do CommitLog initialization > -- > > Key: CASSANDRA-15295 > URL: https://issues.apache.org/jira/browse/CASSANDRA-15295 > Project: Cassandra > Issue Type: Bug > Components: Local/Commit Log >Reporter: Zephyr Guo >Assignee: Zephyr Guo >Priority: Normal > Attachments: jstack.log, pstack.log, screenshot-1.png, > screenshot-2.png, screenshot-3.png > > > Recently, I found a cassandra(3.11.4) node stuck in STARTING status for a > long time. > I used jstack to saw what happened. The main thread stuck in > *AbstractCommitLogSegmentManager.awaitAvailableSegment* > !screenshot-1.png! > The strange thing is COMMIT-LOG-ALLOCATOR thread state was runnable but it > was not actually running. > !screenshot-2.png! > And then I used pstack to troubleshoot. I found COMMIT-LOG-ALLOCATOR block on > java class initialization. > !screenshot-3.png! > This is a deadlock obviously. CommitLog waits for a CommitLogSegment when > initializing. In this moment, the CommitLog class is not initialized and the > main thread holds the class lock. After that, COMMIT-LOG-ALLOCATOR creates a > CommitLogSegment with exception and call *CommitLog.handleCommitError*(static > method). COMMIT-LOG-ALLOCATOR will block on this line because CommitLog > class is still initializing. > > -- This message was sent by Atlassian Jira (v8.3.2#803003) - To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org For additional commands, e-mail: commits-h...@cassandra.apache.org
[jira] [Updated] (CASSANDRA-15295) Running into deadlock when do CommitLog initialization
[ https://issues.apache.org/jira/browse/CASSANDRA-15295?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Jeff Jirsa updated CASSANDRA-15295: --- Bug Category: Parent values: Availability(12983)Level 1 values: Unavailable(12994) Complexity: Normal Discovered By: User Report Severity: Normal Status: Open (was: Triage Needed) > Running into deadlock when do CommitLog initialization > -- > > Key: CASSANDRA-15295 > URL: https://issues.apache.org/jira/browse/CASSANDRA-15295 > Project: Cassandra > Issue Type: Bug > Components: Local/Commit Log >Reporter: Zephyr Guo >Assignee: Zephyr Guo >Priority: Normal > Attachments: jstack.log, pstack.log, screenshot-1.png, > screenshot-2.png, screenshot-3.png > > > Recently, I found a cassandra(3.11.4) node stuck in STARTING status for a > long time. > I used jstack to saw what happened. The main thread stuck in > *AbstractCommitLogSegmentManager.awaitAvailableSegment* > !screenshot-1.png! > The strange thing is COMMIT-LOG-ALLOCATOR thread state was runnable but it > was not actually running. > !screenshot-2.png! > And then I used pstack to troubleshoot. I found COMMIT-LOG-ALLOCATOR block on > java class initialization. > !screenshot-3.png! > This is a deadlock obviously. CommitLog waits for a CommitLogSegment when > initializing. In this moment, the CommitLog class is not initialized and the > main thread holds the class lock. After that, COMMIT-LOG-ALLOCATOR creates a > CommitLogSegment with exception and call *CommitLog.handleCommitError*(static > method). COMMIT-LOG-ALLOCATOR will block on this line because CommitLog > class is still initializing. > > -- This message was sent by Atlassian Jira (v8.3.2#803003) - To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org For additional commands, e-mail: commits-h...@cassandra.apache.org
