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https://issues.apache.org/jira/browse/NIFI-4944?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16390144#comment-16390144
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ASF GitHub Bot commented on NIFI-4944:
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GitHub user mattyb149 opened a pull request:
https://github.com/apache/nifi/pull/2519
NIFI-4944: Guard against race condition in Snappy for PutHiveStreaming
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You can merge this pull request into a Git repository by running:
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Alternatively you can review and apply these changes as the patch at:
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This closes #2519
----
commit 20de68f5e33039c2bb4d3ecd79eddd5e882aa8db
Author: Matthew Burgess <mattyb149@...>
Date: 2018-03-07T20:19:39Z
NIFI-4944: Guard against race condition in Snappy for PutHiveStreaming
----
> PutHiveStreaming multiple instances with Snappy fail intermittently
> -------------------------------------------------------------------
>
> Key: NIFI-4944
> URL: https://issues.apache.org/jira/browse/NIFI-4944
> Project: Apache NiFi
> Issue Type: Bug
> Components: Extensions
> Reporter: Matt Burgess
> Assignee: Matt Burgess
> Priority: Major
>
> When data coming into PutHiveStreaming is compressed with Snappy, then
> multiple instances of PutHiveStreaming in a flow can cause a failure, the log
> often shows the following:
> org.apache.nifi.processors.hive.PutHiveStreaming$$Lambda$510/1467586448@68a5884d
> failed to process due to org.xerial.snappy.SnappyError:
> [FAILED_TO_LOAD_NATIVE_LIBRARY] null; rolling back session: {}
> This is due to a race condition in Snappy 1.0.5 (the version used by the Hive
> NAR) where two classloaders can try to define the native loader class, thus
> the second one would fail, giving the error above.
> The proposed solution is to guarantee that Snappy is loaded before this
> situation is encountered (i.e. before the InstanceClassLoaders are created).
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