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Posted to issues@tez.apache.org by "Aaron Pfeifer (Jira)" <ji...@apache.org> on 2020/05/22 12:17:00 UTC
[jira] [Updated] (TEZ-4187) Shuffle hangs occasionally after fetch
failure with multiple input vertices
[ https://issues.apache.org/jira/browse/TEZ-4187?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Aaron Pfeifer updated TEZ-4187:
-------------------------------
Description:
Hi folks!
There appears to be an issue where the ShuffleSchedulerCallable is not properly interrupted when a fetch failure has occurred from one of multiple input vertices. When this happens, our logs show the ShuffleScheduler (for the input vertex which did *not* set the throwable) running forever in this loop: https://github.com/apache/tez/blob/10cb3519bd34389210e6511a2ba291b52dcda081/tez-runtime-library/src/main/java/org/apache/tez/runtime/library/common/shuffle/orderedgrouped/ShuffleScheduler.java#L1122-L1127
I've attached logs demonstrating this issue and what our DAG looks like (to clarify, the attached DAG graphical view is not from the failed task -- just demonstrates what the vertex relationships are). I can reproduce this almost every time. It always fails on a vertex with more than 1 input.
was:
Hi folks!
There appears to be an issue where the ShuffleSchedulerCallable is not properly interrupted when a fetch failure has occurred from one of multiple input vertices. When this happens, our logs show the ShuffleScheduler (for the input vertex which did *not* set the throwable) running forever in this loop: https://github.com/apache/tez/blob/10cb3519bd34389210e6511a2ba291b52dcda081/tez-runtime-library/src/main/java/org/apache/tez/runtime/library/common/shuffle/orderedgrouped/ShuffleScheduler.java#L1122-L1127
I've attached logs demonstrating this issue and what our DAG looks like. I can reproduce this almost every time. It always fails on a vertex with more than 1 input.
> Shuffle hangs occasionally after fetch failure with multiple input vertices
> ---------------------------------------------------------------------------
>
> Key: TEZ-4187
> URL: https://issues.apache.org/jira/browse/TEZ-4187
> Project: Apache Tez
> Issue Type: Bug
> Affects Versions: 0.9.2
> Environment: Tez 0.9.2
> Hadoop 2.9.2
> Debian 9.12
> Reporter: Aaron Pfeifer
> Priority: Major
> Attachments: DAG.png, task.log
>
>
> Hi folks!
> There appears to be an issue where the ShuffleSchedulerCallable is not properly interrupted when a fetch failure has occurred from one of multiple input vertices. When this happens, our logs show the ShuffleScheduler (for the input vertex which did *not* set the throwable) running forever in this loop: https://github.com/apache/tez/blob/10cb3519bd34389210e6511a2ba291b52dcda081/tez-runtime-library/src/main/java/org/apache/tez/runtime/library/common/shuffle/orderedgrouped/ShuffleScheduler.java#L1122-L1127
> I've attached logs demonstrating this issue and what our DAG looks like (to clarify, the attached DAG graphical view is not from the failed task -- just demonstrates what the vertex relationships are). I can reproduce this almost every time. It always fails on a vertex with more than 1 input.
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