[ 
https://issues.apache.org/jira/browse/FLINK-22945?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Zhu Zhu updated FLINK-22945:
----------------------------
    Description: 
The pending requests in ExecutionSlotAllocator are not cleared when a job 
transitions to CANCELING or FAILING, while all vertices will be canceled and 
assigned slot will be returned. The returned slot is possible to be used to 
fulfill the pending request of a CANCELED vertex and the assignment will fail 
immediately and the slot will be returned and used to fulfilled another vertex 
in a recursive way. StackOverflow can happen in this way when there are many 
vertices, and fatal error can happen and lead to JM will crash. A sample call 
stack is attached below.
To fix this problem, we should clear the pending requests in 
ExecutionSlotAllocator when a job is CANCELING or FAILING. However, I think 
it's better to improve the call stack of slot assignment to avoid similar 
StackOverflowException to occur.


...
        at 
org.apache.flink.runtime.scheduler.SharedSlot.returnLogicalSlot(SharedSlot.java:234)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.jobmaster.slotpool.SingleLogicalSlot.lambda$returnSlotToOwner$0(SingleLogicalSlot.java:203)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
java.util.concurrent.CompletableFuture.uniRun(CompletableFuture.java:705) 
~[?:1.8.0_102]
        at 
java.util.concurrent.CompletableFuture.uniRunStage(CompletableFuture.java:717) 
~[?:1.8.0_102]
        at 
java.util.concurrent.CompletableFuture.thenRun(CompletableFuture.java:2010) 
~[?:1.8.0_102]
        at 
org.apache.flink.runtime.jobmaster.slotpool.SingleLogicalSlot.returnSlotToOwner(SingleLogicalSlot.java:200)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.jobmaster.slotpool.SingleLogicalSlot.releaseSlot(SingleLogicalSlot.java:130)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.scheduler.DefaultScheduler.releaseSlotIfPresent(DefaultScheduler.java:533)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.scheduler.DefaultScheduler.lambda$assignResourceOrHandleError$8(DefaultScheduler.java:512)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
java.util.concurrent.CompletableFuture.uniHandle(CompletableFuture.java:822) 
~[?:1.8.0_102]
        at 
java.util.concurrent.CompletableFuture$UniHandle.tryFire(CompletableFuture.java:797)
 ~[?:1.8.0_102]
        at 
java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474) 
~[?:1.8.0_102]
        at 
java.util.concurrent.CompletableFuture.complete(CompletableFuture.java:1962) 
~[?:1.8.0_102]
        at 
org.apache.flink.runtime.jobmaster.slotpool.DeclarativeSlotPoolBridge$PendingRequest.fulfill(DeclarativeSlotPoolBridge.java:552)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.jobmaster.slotpool.DeclarativeSlotPoolBridge$PendingRequestSlotMatching.fulfillPendingRequest(DeclarativeSlotPoolBridge.java:587)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.jobmaster.slotpool.DeclarativeSlotPoolBridge.newSlotsAreAvailable(DeclarativeSlotPoolBridge.java:171)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.jobmaster.slotpool.DefaultDeclarativeSlotPool.lambda$freeReservedSlot$0(DefaultDeclarativeSlotPool.java:316)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at java.util.Optional.ifPresent(Optional.java:159) ~[?:1.8.0_102]
        at 
org.apache.flink.runtime.jobmaster.slotpool.DefaultDeclarativeSlotPool.freeReservedSlot(DefaultDeclarativeSlotPool.java:313)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.jobmaster.slotpool.DeclarativeSlotPoolBridge.releaseSlot(DeclarativeSlotPoolBridge.java:335)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.jobmaster.slotpool.PhysicalSlotProviderImpl.cancelSlotRequest(PhysicalSlotProviderImpl.java:112)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.scheduler.SlotSharingExecutionSlotAllocator.releaseSharedSlot(SlotSharingExecutionSlotAllocator.java:242)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.scheduler.SharedSlot.releaseExternally(SharedSlot.java:281)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.scheduler.SharedSlot.removeLogicalSlotRequest(SharedSlot.java:242)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.scheduler.SharedSlot.returnLogicalSlot(SharedSlot.java:234)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.jobmaster.slotpool.SingleLogicalSlot.lambda$returnSlotToOwner$0(SingleLogicalSlot.java:203)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
java.util.concurrent.CompletableFuture.uniRun(CompletableFuture.java:705) 
~[?:1.8.0_102]
        at 
java.util.concurrent.CompletableFuture.uniRunStage(CompletableFuture.java:717) 
~[?:1.8.0_102]
        at 
java.util.concurrent.CompletableFuture.thenRun(CompletableFuture.java:2010) 
~[?:1.8.0_102]
        at 
org.apache.flink.runtime.jobmaster.slotpool.SingleLogicalSlot.returnSlotToOwner(SingleLogicalSlot.java:200)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.jobmaster.slotpool.SingleLogicalSlot.releaseSlot(SingleLogicalSlot.java:130)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
...

  was:
The pending requests in ExecutionSlotAllocator are not cleared when a job 
transitions to CANCELING or FAILING, while all vertices will be canceled and 
assigned slot will be returned. The returned slot is possible to be used to 
fulfill the pending request of a CANCELED vertex and the assignment will fail 
immediately and the slot will be returned and used to fulfilled another vertex 
in a recursive way. StackOverflow can happen in this way when there are many 
vertices. A sample call stack is attached below.
To fix this problem, we should clear the pending requests in 
ExecutionSlotAllocator when a job is CANCELING or FAILING. However, I think 
it's better to improve the call stack of slot assignment to avoid similar 
StackOverflowException to occur.


...
        at 
org.apache.flink.runtime.scheduler.SharedSlot.returnLogicalSlot(SharedSlot.java:234)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.jobmaster.slotpool.SingleLogicalSlot.lambda$returnSlotToOwner$0(SingleLogicalSlot.java:203)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
java.util.concurrent.CompletableFuture.uniRun(CompletableFuture.java:705) 
~[?:1.8.0_102]
        at 
java.util.concurrent.CompletableFuture.uniRunStage(CompletableFuture.java:717) 
~[?:1.8.0_102]
        at 
java.util.concurrent.CompletableFuture.thenRun(CompletableFuture.java:2010) 
~[?:1.8.0_102]
        at 
org.apache.flink.runtime.jobmaster.slotpool.SingleLogicalSlot.returnSlotToOwner(SingleLogicalSlot.java:200)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.jobmaster.slotpool.SingleLogicalSlot.releaseSlot(SingleLogicalSlot.java:130)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.scheduler.DefaultScheduler.releaseSlotIfPresent(DefaultScheduler.java:533)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.scheduler.DefaultScheduler.lambda$assignResourceOrHandleError$8(DefaultScheduler.java:512)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
java.util.concurrent.CompletableFuture.uniHandle(CompletableFuture.java:822) 
~[?:1.8.0_102]
        at 
java.util.concurrent.CompletableFuture$UniHandle.tryFire(CompletableFuture.java:797)
 ~[?:1.8.0_102]
        at 
java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474) 
~[?:1.8.0_102]
        at 
java.util.concurrent.CompletableFuture.complete(CompletableFuture.java:1962) 
~[?:1.8.0_102]
        at 
org.apache.flink.runtime.jobmaster.slotpool.DeclarativeSlotPoolBridge$PendingRequest.fulfill(DeclarativeSlotPoolBridge.java:552)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.jobmaster.slotpool.DeclarativeSlotPoolBridge$PendingRequestSlotMatching.fulfillPendingRequest(DeclarativeSlotPoolBridge.java:587)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.jobmaster.slotpool.DeclarativeSlotPoolBridge.newSlotsAreAvailable(DeclarativeSlotPoolBridge.java:171)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.jobmaster.slotpool.DefaultDeclarativeSlotPool.lambda$freeReservedSlot$0(DefaultDeclarativeSlotPool.java:316)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at java.util.Optional.ifPresent(Optional.java:159) ~[?:1.8.0_102]
        at 
org.apache.flink.runtime.jobmaster.slotpool.DefaultDeclarativeSlotPool.freeReservedSlot(DefaultDeclarativeSlotPool.java:313)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.jobmaster.slotpool.DeclarativeSlotPoolBridge.releaseSlot(DeclarativeSlotPoolBridge.java:335)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.jobmaster.slotpool.PhysicalSlotProviderImpl.cancelSlotRequest(PhysicalSlotProviderImpl.java:112)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.scheduler.SlotSharingExecutionSlotAllocator.releaseSharedSlot(SlotSharingExecutionSlotAllocator.java:242)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.scheduler.SharedSlot.releaseExternally(SharedSlot.java:281)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.scheduler.SharedSlot.removeLogicalSlotRequest(SharedSlot.java:242)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.scheduler.SharedSlot.returnLogicalSlot(SharedSlot.java:234)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.jobmaster.slotpool.SingleLogicalSlot.lambda$returnSlotToOwner$0(SingleLogicalSlot.java:203)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
java.util.concurrent.CompletableFuture.uniRun(CompletableFuture.java:705) 
~[?:1.8.0_102]
        at 
java.util.concurrent.CompletableFuture.uniRunStage(CompletableFuture.java:717) 
~[?:1.8.0_102]
        at 
java.util.concurrent.CompletableFuture.thenRun(CompletableFuture.java:2010) 
~[?:1.8.0_102]
        at 
org.apache.flink.runtime.jobmaster.slotpool.SingleLogicalSlot.returnSlotToOwner(SingleLogicalSlot.java:200)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
        at 
org.apache.flink.runtime.jobmaster.slotpool.SingleLogicalSlot.releaseSlot(SingleLogicalSlot.java:130)
 ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
...


> StackOverflowException can happen when a large scale job is CANCELED/FAILED
> ---------------------------------------------------------------------------
>
>                 Key: FLINK-22945
>                 URL: https://issues.apache.org/jira/browse/FLINK-22945
>             Project: Flink
>          Issue Type: Bug
>    Affects Versions: 1.13.1, 1.12.4
>            Reporter: Zhu Zhu
>            Priority: Critical
>
> The pending requests in ExecutionSlotAllocator are not cleared when a job 
> transitions to CANCELING or FAILING, while all vertices will be canceled and 
> assigned slot will be returned. The returned slot is possible to be used to 
> fulfill the pending request of a CANCELED vertex and the assignment will fail 
> immediately and the slot will be returned and used to fulfilled another 
> vertex in a recursive way. StackOverflow can happen in this way when there 
> are many vertices, and fatal error can happen and lead to JM will crash. A 
> sample call stack is attached below.
> To fix this problem, we should clear the pending requests in 
> ExecutionSlotAllocator when a job is CANCELING or FAILING. However, I think 
> it's better to improve the call stack of slot assignment to avoid similar 
> StackOverflowException to occur.
> ...
>       at 
> org.apache.flink.runtime.scheduler.SharedSlot.returnLogicalSlot(SharedSlot.java:234)
>  ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
>       at 
> org.apache.flink.runtime.jobmaster.slotpool.SingleLogicalSlot.lambda$returnSlotToOwner$0(SingleLogicalSlot.java:203)
>  ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
>       at 
> java.util.concurrent.CompletableFuture.uniRun(CompletableFuture.java:705) 
> ~[?:1.8.0_102]
>       at 
> java.util.concurrent.CompletableFuture.uniRunStage(CompletableFuture.java:717)
>  ~[?:1.8.0_102]
>       at 
> java.util.concurrent.CompletableFuture.thenRun(CompletableFuture.java:2010) 
> ~[?:1.8.0_102]
>       at 
> org.apache.flink.runtime.jobmaster.slotpool.SingleLogicalSlot.returnSlotToOwner(SingleLogicalSlot.java:200)
>  ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
>       at 
> org.apache.flink.runtime.jobmaster.slotpool.SingleLogicalSlot.releaseSlot(SingleLogicalSlot.java:130)
>  ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
>       at 
> org.apache.flink.runtime.scheduler.DefaultScheduler.releaseSlotIfPresent(DefaultScheduler.java:533)
>  ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
>       at 
> org.apache.flink.runtime.scheduler.DefaultScheduler.lambda$assignResourceOrHandleError$8(DefaultScheduler.java:512)
>  ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
>       at 
> java.util.concurrent.CompletableFuture.uniHandle(CompletableFuture.java:822) 
> ~[?:1.8.0_102]
>       at 
> java.util.concurrent.CompletableFuture$UniHandle.tryFire(CompletableFuture.java:797)
>  ~[?:1.8.0_102]
>       at 
> java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
>  ~[?:1.8.0_102]
>       at 
> java.util.concurrent.CompletableFuture.complete(CompletableFuture.java:1962) 
> ~[?:1.8.0_102]
>       at 
> org.apache.flink.runtime.jobmaster.slotpool.DeclarativeSlotPoolBridge$PendingRequest.fulfill(DeclarativeSlotPoolBridge.java:552)
>  ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
>       at 
> org.apache.flink.runtime.jobmaster.slotpool.DeclarativeSlotPoolBridge$PendingRequestSlotMatching.fulfillPendingRequest(DeclarativeSlotPoolBridge.java:587)
>  ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
>       at 
> org.apache.flink.runtime.jobmaster.slotpool.DeclarativeSlotPoolBridge.newSlotsAreAvailable(DeclarativeSlotPoolBridge.java:171)
>  ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
>       at 
> org.apache.flink.runtime.jobmaster.slotpool.DefaultDeclarativeSlotPool.lambda$freeReservedSlot$0(DefaultDeclarativeSlotPool.java:316)
>  ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
>       at java.util.Optional.ifPresent(Optional.java:159) ~[?:1.8.0_102]
>       at 
> org.apache.flink.runtime.jobmaster.slotpool.DefaultDeclarativeSlotPool.freeReservedSlot(DefaultDeclarativeSlotPool.java:313)
>  ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
>       at 
> org.apache.flink.runtime.jobmaster.slotpool.DeclarativeSlotPoolBridge.releaseSlot(DeclarativeSlotPoolBridge.java:335)
>  ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
>       at 
> org.apache.flink.runtime.jobmaster.slotpool.PhysicalSlotProviderImpl.cancelSlotRequest(PhysicalSlotProviderImpl.java:112)
>  ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
>       at 
> org.apache.flink.runtime.scheduler.SlotSharingExecutionSlotAllocator.releaseSharedSlot(SlotSharingExecutionSlotAllocator.java:242)
>  ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
>       at 
> org.apache.flink.runtime.scheduler.SharedSlot.releaseExternally(SharedSlot.java:281)
>  ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
>       at 
> org.apache.flink.runtime.scheduler.SharedSlot.removeLogicalSlotRequest(SharedSlot.java:242)
>  ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
>       at 
> org.apache.flink.runtime.scheduler.SharedSlot.returnLogicalSlot(SharedSlot.java:234)
>  ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
>       at 
> org.apache.flink.runtime.jobmaster.slotpool.SingleLogicalSlot.lambda$returnSlotToOwner$0(SingleLogicalSlot.java:203)
>  ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
>       at 
> java.util.concurrent.CompletableFuture.uniRun(CompletableFuture.java:705) 
> ~[?:1.8.0_102]
>       at 
> java.util.concurrent.CompletableFuture.uniRunStage(CompletableFuture.java:717)
>  ~[?:1.8.0_102]
>       at 
> java.util.concurrent.CompletableFuture.thenRun(CompletableFuture.java:2010) 
> ~[?:1.8.0_102]
>       at 
> org.apache.flink.runtime.jobmaster.slotpool.SingleLogicalSlot.returnSlotToOwner(SingleLogicalSlot.java:200)
>  ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
>       at 
> org.apache.flink.runtime.jobmaster.slotpool.SingleLogicalSlot.releaseSlot(SingleLogicalSlot.java:130)
>  ~[flink-dist_2.11-1.13-vvr-4.0-SNAPSHOT.jar:1.13-vvr-4.0-SNAPSHOT]
> ...



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