Koji Kawamura created NIFI-3894:
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Summary: NiFi Crashes with OOM if compression is enabled on an RPG
with high number of FlowFiles
Key: NIFI-3894
URL: https://issues.apache.org/jira/browse/NIFI-3894
Project: Apache NiFi
Issue Type: Bug
Components: Core Framework
Affects Versions: 0.7.0
Reporter: Koji Kawamura
Assignee: Koji Kawamura
RemoteProcessGroup can be configured to use compression per port.
OutOfMemoryError occurred with a large amount of FlowFiles queued in an output
port and a NiFi S2S client pulled those via RPG with compression enabled.
Without compression, the same amount of FlowFiles can be transferred without
issue. Here is the stack trace:
{code}
2017-04-06 18:21:59,063 WARN [Timer-Driven Process Thread-5]
o.a.n.c.t.ContinuallyRunConnectableTask
StandardRootGroupPort[id=cc3ad50e-0159-1000-0000-00001c8cf0ef] Administratively
Pausing for 10 seconds due to processing failure: java.lang.OutOfMemoryError
java.lang.OutOfMemoryError: null
at java.util.zip.Deflater.init(Native Method) ~[na:1.8.0_77]
at java.util.zip.Deflater.<init>(Deflater.java:171) ~[na:1.8.0_77]
at java.util.zip.Deflater.<init>(Deflater.java:180) ~[na:1.8.0_77]
at
org.apache.nifi.remote.io.CompressionOutputStream.<init>(CompressionOutputStream.java:54)
~[nifi-utils-1.1.0.2.1.1.0-2.jar:1.1.0.2.1.1.0-2]
{code}
It happens because CompressionOutputStream.close does not call end() method of
a Deflater It calls resets() but not end().
https://github.com/apache/nifi/blob/master/nifi-commons/nifi-utils/src/main/java/org/apache/nifi/remote/io/CompressionOutputStream.java#L141
The issue is the same with this:
JDK-4797189 : Finalizers not called promptly enough
http://bugs.java.com/view_bug.do?bug_id=4797189
{quote}
WORK AROUND
Invoke "end()" on any Inflator or Deflator once it is no longer in use. This
will clean up the process space (non Java/GC) memory.
{quote}
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