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From "Robert Metzger (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (FLINK-12385) RestClusterClient can hang indefinitely during job submission
Date Wed, 08 May 2019 07:21:00 GMT

     [ https://issues.apache.org/jira/browse/FLINK-12385?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Robert Metzger updated FLINK-12385:
-----------------------------------
    Component/s: Runtime / Coordination

> RestClusterClient can hang indefinitely during job submission
> -------------------------------------------------------------
>
>                 Key: FLINK-12385
>                 URL: https://issues.apache.org/jira/browse/FLINK-12385
>             Project: Flink
>          Issue Type: Bug
>          Components: Runtime / Coordination, Runtime / REST
>    Affects Versions: 1.8.0
>            Reporter: Matt Dailey
>            Priority: Minor
>
> We have had situations where clients would hang indefinitely during job submission, even
when job submission would succeed. We have not yet characterized what happened on the server
to cause this, but we thought that the client should have a timeout for these requests.
> This was observed in Flink 1.5.5, but the code seems to still have this problem in 1.8.0.
One option is to include a timeout in calls to {{CompletableFuture.get()}}:
>  * [RestClusterClient in 1.5.5|https://github.com/apache/flink/blob/release-1.5.5/flink-clients/src/main/java/org/apache/flink/client/program/rest/RestClusterClient.java#L246]
>  * [RestClusterClient in 1.8.0|https://github.com/apache/flink/blob/release-1.8.0/flink-clients/src/main/java/org/apache/flink/client/program/rest/RestClusterClient.java#L247]
> Thread dump from client running Flink 1.5.5, running in Java 8:
> {noformat}
> http-nio-0.0.0.0-8443-exec-6" #34 daemon prio=5 os_prio=0 tid=0x000055b421fd2000 nid=0x29
waiting on condition [0x00007f932e176000]
>    java.lang.Thread.State: WAITING (parking)
> 	at sun.misc.Unsafe.park(Native Method)
> 	- parking to wait for  <0x00000000b331d7c0> (a java.util.concurrent.CompletableFuture$Signaller)
> 	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
> 	at java.util.concurrent.CompletableFuture$Signaller.block(CompletableFuture.java:1693)
> 	at java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3323)
> 	at java.util.concurrent.CompletableFuture.waitingGet(CompletableFuture.java:1729)
> 	at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1895)
> 	at org.apache.flink.client.program.rest.RestClusterClient.submitJob(RestClusterClient.java:246)
> 	at org.apache.flink.client.program.ClusterClient.run(ClusterClient.java:464)
> 	at org.apache.flink.client.program.DetachedEnvironment.finalizeExecute(DetachedEnvironment.java:77)
> 	at org.apache.flink.client.program.ClusterClient.run(ClusterClient.java:410)
> {noformat}



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