[jira] [Resolved] (NIFI-5946) Hive3Streaming memory leak

["Gideon Korir (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NIFI-5946?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gideon Korir resolved NIFI-5946.
--------------------------------
       Resolution: Duplicate
    Fix Version/s: 1.9.0

> Hive3Streaming memory leak
> --------------------------
>
>                 Key: NIFI-5946
>                 URL: https://issues.apache.org/jira/browse/NIFI-5946
>             Project: Apache NiFi
>          Issue Type: Improvement
>          Components: Extensions
>    Affects Versions: 1.8.0
>         Environment: Rhel 7.5
> Open jdk 1.8
> NiFi 1.8
> HDP 3
>            Reporter: Gideon Korir
>            Priority: Major
>             Fix For: 1.9.0
>
>         Attachments: nifi_memory_leak.png
>
>
> Our NiFi instance has been leaking memory since started using Hive3Streaming processor and now we are seeing memory usage of 60+ GB. Looking at the processor code it seems like we are:
>  # Creating a new StreamingConnection with each flow file
>  # Registering a shutdown hook via <code>ShutdownHookManager.addShutdownHook</code> that should close the connection
>  # Closing the connection and not removing the shutdown hook.
> The Runnable captures the connection and conf objects, and since our NiFi instance has been running continuously and the JVM hasn't shutdown (3 weeks +) the ShutdownHookManager is still holding reference to the connections created since causing the memory leak.



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