[jira] [Created] (OAK-1524) NPE in TarMK flush thread

[Chetan Mehrotra (JIRA)]

Chetan Mehrotra created OAK-1524:
------------------------------------

             Summary: NPE in TarMK flush thread
                 Key: OAK-1524
                 URL: https://issues.apache.org/jira/browse/OAK-1524
             Project: Jackrabbit Oak
          Issue Type: Bug
          Components: core
            Reporter: Chetan Mehrotra
            Assignee: Jukka Zitting
            Priority: Minor
             Fix For: 0.19


Following exception is seen at times with SegmentStore

{noformat}
unning org.apache.jackrabbit.oak.jcr.tck.NodetypeIT
Exception in thread "TarMK flush thread: target/tar.1303694685400657" 
java.lang.NullPointerException
        at 
org.apache.jackrabbit.oak.plugins.segment.file.FileStore.flush(FileStore.java:237)
        at 
org.apache.jackrabbit.oak.plugins.segment.file.FileStore$1.run(FileStore.java:196)
        at java.lang.Thread.run(Thread.java:662)

{noformat}

Looking at FileStore#L237 [1] {{segments}} might be null when memoryMapped mode 
is used (default). Possibly a null check is required there

[1] 
https://github.com/apache/jackrabbit-oak/blob/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/segment/file/FileStore.java#L237



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