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https://issues.apache.org/jira/browse/CASSANDRA-11243?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Matteo Zuccon updated CASSANDRA-11243:
--------------------------------------
    Description: 
Error: "util.ResourceLeakDetector: LEAK: You are creating too many 
HashedWheelTimer instances.  HashedWheelTimer is a shared resource that must be 
reused across the JVM,so that only a few instances are created"

Using CqlInputFormat.Class as input format for an Hadoop Mapreduce program (on 
distributed Hadoop Cluster) gives a memory leak error.

Version of the library used:

<dependency>
        <groupId>org.apache.cassandra</groupId>
        <artifactId>cassandra-all</artifactId>
        <version>3.3</version>
</dependency>

The same jar is working on a single node Hadoop configuration, the memory leak 
error show up in the cluster hadoop configuration.



  was:
Error: "util.ResourceLeakDetector: LEAK: You are creating too many 
HashedWheelTimer instances.  HashedWheelTimer is a shared resource that must be 
reused across the JVM,so that only a few instances are created"

Using CqlInputFormat.Class as input format for an Hadoop Mapreduce program (on 
distributed Hadoop Cluster) gives a memory leak error.

Version of the library used:

<dependency>
        <groupId>org.apache.cassandra</groupId>
        <artifactId>cassandra-all</artifactId>
        <version>3.3</version>
</dependency>



> Memory LEAK CqlInputFormat
> --------------------------
>
>                 Key: CASSANDRA-11243
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-11243
>             Project: Cassandra
>          Issue Type: Bug
>         Environment: Ubuntu 14.04.04 LTS
> Hadoop 2.7
> Cassandra 3.3
>            Reporter: Matteo Zuccon
>
> Error: "util.ResourceLeakDetector: LEAK: You are creating too many 
> HashedWheelTimer instances.  HashedWheelTimer is a shared resource that must 
> be reused across the JVM,so that only a few instances are created"
> Using CqlInputFormat.Class as input format for an Hadoop Mapreduce program 
> (on distributed Hadoop Cluster) gives a memory leak error.
> Version of the library used:
> <dependency>
>       <groupId>org.apache.cassandra</groupId>
>       <artifactId>cassandra-all</artifactId>
>       <version>3.3</version>
> </dependency>
> The same jar is working on a single node Hadoop configuration, the memory 
> leak error show up in the cluster hadoop configuration.



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