[jira] [Commented] (FLINK-9009) Error| You are creating too many HashedWheelTimer instances. HashedWheelTimer is a shared resource that must be reused across the application, so that only a few instances are created.

["Stephan Ewen (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-9009?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16401901#comment-16401901 ] 

Stephan Ewen commented on FLINK-9009:
-------------------------------------

I assume that error is reported by Kafka?
Can you past the stack trace?


> Error| You are creating too many HashedWheelTimer instances.  HashedWheelTimer is a shared resource that must be reused across the application, so that only a few instances are created.
> -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: FLINK-9009
>                 URL: https://issues.apache.org/jira/browse/FLINK-9009
>             Project: Flink
>          Issue Type: Bug
>         Environment: Pass platform: Openshit
>            Reporter: Pankaj
>            Priority: Blocker
>
> Steps to reproduce:
> 1- Flink with Kafka as a consumer -> Writing stream to Cassandra using flink cassandra sink.
> 2- In memory Job manager and task manager with checkpointing 5000ms.
> 3- env.setpararllelism(10)-> As kafka topic has 10 partition.
> 4- There are around 13 unique streams in a single flink run time environment which are reading from kafka -> processing and writing to cassandra.
> Hardware: CPU 200 milli core . It is deployed on Paas platform on one node
> Memory: 526 MB.
>  
> When i start the server, It starts flink and all off sudden stops with above error. It also shows out of memory error.
>  
> It would be nice if any body can suggest if something is wrong.
>  
> Maven:
> flink-connector-cassandra_2.11: 1.3.2
> flink-streaming-java_2.11: 1.4.0
> flink-connector-kafka-0.11_2.11:1.4.0
>  
>  
>  



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