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Posted to commits@druid.apache.org by GitBox <gi...@apache.org> on 2019/05/07 13:36:03 UTC
[GitHub] [incubator-druid] mihai-cazacu-adswizz edited a comment on issue
#7597: [materialized view] The generated specification is too big
mihai-cazacu-adswizz edited a comment on issue #7597: [materialized view] The generated specification is too big
URL: https://github.com/apache/incubator-druid/issues/7597#issuecomment-490081669
I have increased the `druid.indexer.runner.maxZnodeBytes` value to `2.5MB` and everything worked fine until the Supervisor reached an interval with many segments (the [created JSON](https://github.com/apache/incubator-druid/blob/master/indexing-service/src/main/java/org/apache/druid/indexing/overlord/RemoteTaskRunner.java#L863) has ~ `1.5MB`). Starting from this point, the `Waiting Tasks - Tasks waiting on locks` section in Overlord was filled with dozens of MV tasks (for the same data source: `index_materialized_view_test_2019-05-07...`).
The error:
```
ERROR [LeaderSelector[/druid/druid-prod/overlord/_OVERLORD]] org.apache.druid.curator.discovery.CuratorDruidLeaderSelector - listener becomeLeader() failed. Unable to become leader: {class=org.apache.druid.curator.discovery.CuratorDruidLeaderSelector, exceptionType=class org.apache.druid.java.util.common.ISE, exceptionMessage=Could not reacquire lock on interval[2019-02-21T00:00:00.000Z/2019-02-22T00:00:00.000Z] version[2019-05-07T11:24:03.543Z] for task: index_materialized_view_test_2019-05-07T11:16:05.026Z}
org.apache.druid.java.util.common.ISE: Could not reacquire lock on interval[2019-02-21T00:00:00.000Z/2019-02-22T00:00:00.000Z] version[2019-05-07T11:24:03.543Z] for task: index_materialized_view_test_2019-05-07T11:16:05.026Z
at org.apache.druid.indexing.overlord.TaskLockbox.syncFromStorage(TaskLockbox.java:171) ~[druid-indexing-service-0.13.0-incubating.jar:0.13.0-incubating]
at org.apache.druid.indexing.overlord.TaskMaster$1.becomeLeader(TaskMaster.java:109) ~[druid-indexing-service-0.13.0-incubating.jar:0.13.0-incubating]
at org.apache.druid.curator.discovery.CuratorDruidLeaderSelector$1.isLeader(CuratorDruidLeaderSelector.java:98) [druid-server-0.13.0-incubating.jar:0.13.0-incubating]
at org.apache.curator.framework.recipes.leader.LeaderLatch$9.apply(LeaderLatch.java:665) [curator-recipes-4.0.0.jar:4.0.0]
at org.apache.curator.framework.recipes.leader.LeaderLatch$9.apply(LeaderLatch.java:661) [curator-recipes-4.0.0.jar:4.0.0]
at org.apache.curator.framework.listen.ListenerContainer$1.run(ListenerContainer.java:93) [curator-framework-4.0.0.jar:4.0.0]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_201]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_201]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_201]
```
Because of this error, the Overlord has stopped to respond.
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