[CASSANDRA-11243] Memory LEAK CqlInputFormat

• Type: Bug
• Status: Open
• Priority: Normal
• Resolution: Unresolved
• Component/s: Legacy/CQL

Environment

Ubuntu 14.04.04 LTS
Hadoop 2.7
Cassandra 3.3

• Severity: Normal
• Assignee: Unassigned
• Reporter: Matteo Zuccon
• Created: 25/Feb/16 20:35
• Updated: 16/Apr/19 09:30

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.