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https://issues.apache.org/jira/browse/KAFKA-5998?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16822537#comment-16822537
]
Matthias J. Sax commented on KAFKA-5998:
----------------------------------------
[~drshade] Instead of using the PID to separate the state directory, it might
be better to do some manual assignment to make sure that each instance uses a
different state directory that it can reuse on restart. Also, it's not
recommended to use `/tmp/` as state directory anyway for production use cases.
[~yuzhih...@gmail.com] The checkpoint file should be used by exactly one task.
Thus, I am not sure how reference counting would help? The underlying problem
seems to be, that the locking mechanism is somehow broken and even if a task
holds a lock to protect the checkpoint file, some other thread is able to grab
the lock, too (what should never happen) and deletes the file. Reference
counting would also need a lock mechanism to make sure the file is not written
concurrently, but as the lock mechanism is somehow broken, the assume that we
"move" the problem from a "file not found" to potentially corrupting the
reference count. Or did I miss understand your proposal?
> /.checkpoint.tmp Not found exception
> ------------------------------------
>
> Key: KAFKA-5998
> URL: https://issues.apache.org/jira/browse/KAFKA-5998
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 0.11.0.0, 0.11.0.1, 2.1.1
> Reporter: Yogesh BG
> Priority: Critical
> Attachments: 5998.v1.txt, 5998.v2.txt, Topology.txt, exc.txt,
> props.txt, streams.txt
>
>
> I have one kafka broker and one kafka stream running... I am running its
> since two days under load of around 2500 msgs per second.. On third day am
> getting below exception for some of the partitions, I have 16 partitions only
> 0_0 and 0_1 gives this error
> {{09:43:25.955 [ks_0_inst-StreamThread-6] WARN
> o.a.k.s.p.i.ProcessorStateManager - Failed to write checkpoint file to
> /data/kstreams/rtp-kafkastreams/0_1/.checkpoint:
> java.io.FileNotFoundException:
> /data/kstreams/rtp-kafkastreams/0_1/.checkpoint.tmp (No such file or
> directory)
> at java.io.FileOutputStream.open(Native Method) ~[na:1.7.0_111]
> at java.io.FileOutputStream.<init>(FileOutputStream.java:221)
> ~[na:1.7.0_111]
> at java.io.FileOutputStream.<init>(FileOutputStream.java:171)
> ~[na:1.7.0_111]
> at
> org.apache.kafka.streams.state.internals.OffsetCheckpoint.write(OffsetCheckpoint.java:73)
> ~[rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> at
> org.apache.kafka.streams.processor.internals.ProcessorStateManager.checkpoint(ProcessorStateManager.java:324)
> ~[rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> at
> org.apache.kafka.streams.processor.internals.StreamTask$1.run(StreamTask.java:267)
> [rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> at
> org.apache.kafka.streams.processor.internals.StreamsMetricsImpl.measureLatencyNs(StreamsMetricsImpl.java:201)
> [rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> at
> org.apache.kafka.streams.processor.internals.StreamTask.commit(StreamTask.java:260)
> [rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> at
> org.apache.kafka.streams.processor.internals.StreamTask.commit(StreamTask.java:254)
> [rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> at
> org.apache.kafka.streams.processor.internals.AssignedTasks$1.apply(AssignedTasks.java:322)
> [rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> at
> org.apache.kafka.streams.processor.internals.AssignedTasks.applyToRunningTasks(AssignedTasks.java:415)
> [rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> at
> org.apache.kafka.streams.processor.internals.AssignedTasks.commit(AssignedTasks.java:314)
> [rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> at
> org.apache.kafka.streams.processor.internals.StreamThread.commitAll(StreamThread.java:700)
> [rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> at
> org.apache.kafka.streams.processor.internals.StreamThread.maybeCommit(StreamThread.java:683)
> [rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> at
> org.apache.kafka.streams.processor.internals.StreamThread.runOnce(StreamThread.java:523)
> [rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> at
> org.apache.kafka.streams.processor.internals.StreamThread.runLoop(StreamThread.java:480)
> [rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> at
> org.apache.kafka.streams.processor.internals.StreamThread.run(StreamThread.java:457)
> [rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> 09:43:25.974 [ks_0_inst-StreamThread-15] WARN
> o.a.k.s.p.i.ProcessorStateManager - Failed to write checkpoint file to
> /data/kstreams/rtp-kafkastreams/0_0/.checkpoint:
> java.io.FileNotFoundException:
> /data/kstreams/rtp-kafkastreams/0_0/.checkpoint.tmp (No such file or
> directory)
> at java.io.FileOutputStream.open(Native Method) ~[na:1.7.0_111]
> at java.io.FileOutputStream.<init>(FileOutputStream.java:221)
> ~[na:1.7.0_111]
> at java.io.FileOutputStream.<init>(FileOutputStream.java:171)
> ~[na:1.7.0_111]
> at
> org.apache.kafka.streams.state.internals.OffsetCheckpoint.write(OffsetCheckpoint.java:73)
> ~[rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> at
> org.apache.kafka.streams.processor.internals.ProcessorStateManager.checkpoint(ProcessorStateManager.java:324)
> ~[rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> at
> org.apache.kafka.streams.processor.internals.StreamTask$1.run(StreamTask.java:267)
> [rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> at
> org.apache.kafka.streams.processor.internals.StreamsMetricsImpl.measureLatencyNs(StreamsMetricsImpl.java:201)
> [rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> at
> org.apache.kafka.streams.processor.internals.StreamTask.commit(StreamTask.java:260)
> [rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> at
> org.apache.kafka.streams.processor.internals.StreamTask.commit(StreamTask.java:254)
> [rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> at
> org.apache.kafka.streams.processor.internals.AssignedTasks$1.apply(AssignedTasks.java:322)
> [rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> at
> org.apache.kafka.streams.processor.internals.AssignedTasks.applyToRunningTasks(AssignedTasks.java:415)
> [rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> at
> org.apache.kafka.streams.processor.internals.AssignedTasks.commit(AssignedTasks.java:314)
> [rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> at
> org.apache.kafka.streams.processor.internals.StreamThread.commitAll(StreamThread.java:700)
> [rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> at
> org.apache.kafka.streams.processor.internals.StreamThread.maybeCommit(StreamThread.java:683)
> [rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> at
> org.apache.kafka.streams.processor.internals.StreamThread.runOnce(StreamThread.java:523)
> [rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> at
> org.apache.kafka.streams.processor.internals.StreamThread.runLoop(StreamThread.java:480)
> [rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> at
> org.apache.kafka.streams.processor.internals.StreamThread.run(StreamThread.java:457)
> [rtp-kafkastreams-1.0-SNAPSHOT-jar-with-dependencies.jar:na]
> }}
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