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Posted to issues@storm.apache.org by "Jungtaek Lim (JIRA)" <ji...@apache.org> on 2019/03/15 18:45:00 UTC
[jira] [Resolved] (STORM-3319) Slot can fail assertions in some
cases
[ https://issues.apache.org/jira/browse/STORM-3319?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jungtaek Lim resolved STORM-3319.
---------------------------------
Resolution: Fixed
Fix Version/s: 2.0.1
Thanks [~Srdo] to the great effort on fixing instability of tests, and sorry to let you wait too long. I merged into master.
> Slot can fail assertions in some cases
> --------------------------------------
>
> Key: STORM-3319
> URL: https://issues.apache.org/jira/browse/STORM-3319
> Project: Apache Storm
> Issue Type: Bug
> Affects Versions: 2.0.0
> Reporter: Stig Rohde Døssing
> Assignee: Stig Rohde Døssing
> Priority: Major
> Labels: pull-request-available
> Fix For: 2.0.1
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> {quote}
> 2019-01-19 22:47:03.045 [SLOT_1024] ERROR org.apache.storm.daemon.supervisor.Slot - Error when processing event
> java.lang.AssertionError: null
> at org.apache.storm.daemon.supervisor.Slot.handleEmpty(Slot.java:781) ~[classes/:?]
> at org.apache.storm.daemon.supervisor.Slot.stateMachineStep(Slot.java:217) ~[classes/:?]
> at org.apache.storm.daemon.supervisor.Slot.run(Slot.java:900) [classes/:?]
> 2019-01-19 22:47:03.045 [SLOT_1025] ERROR org.apache.storm.daemon.supervisor.Slot - Error when processing event
> java.lang.AssertionError: null
> at org.apache.storm.daemon.supervisor.Slot.handleEmpty(Slot.java:781) ~[classes/:?]
> at org.apache.storm.daemon.supervisor.Slot.stateMachineStep(Slot.java:217) ~[classes/:?]
> at org.apache.storm.daemon.supervisor.Slot.run(Slot.java:900) [classes/:?]
> {quote}
> The issue is that Slot tries to go from WAITING_FOR_LOCALIZATION to EMPTY when there's an exception downloading a blob. It then fails one of the assertions in EMPTY because it doesn't clear its pendingChangingBlobsAssignment field.
> There's no reason to go back to EMPTY. The Slot still wants to download some blobs, so it should just restart the downloads and go back to WAITING_FOR_LOCALIZATION.
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