Unfortunately the stack trace was swallowed by the java timer in the LocalInputChannel[1], the real error is forwarded out to the main thread but I couldn’t figure out how to see that in my logs.
However, I believe I am close to having a reproducible example. Run a 1.4 DataStream, sinking to kafka 0.11 and cancel with a savepoint. If you then shut down the kafka daemon on a single broker but keep the rest proxy up you should see this error when you resume. [1] https://github.com/apache/flink/blob/fa024726bb801fc71cec5cc303cac1d4a03f555e/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/LocalInputChannel.java#L151 [cid:image001.png@01D3BB7D.472CF0B0] Seth Wiesman| Software Engineer 4 World Trade Center, 46th Floor, New York, NY 10007 swies...@mediamath.com<mailto:fl...@mediamath.com> From: Fabian Hueske <fhue...@gmail.com> Date: Tuesday, March 13, 2018 at 8:02 PM To: Seth Wiesman <swies...@mediamath.com>, Stefan Richter <s.rich...@data-artisans.com> Cc: "user@flink.apache.org" <user@flink.apache.org> Subject: Re: PartitionNotFoundException when restarting from checkpoint Hi Seth, Thanks for sharing how you resolved the problem! The problem might have been related to Flink's key groups which are used to assign key ranges to tasks. Not sure why this would be related to ZooKeeper being in a bad state. Maybe Stefan (in CC) has an idea about the cause. Also, it would be helpful if you could share the stacktrace of the exception (in case you still have it). Best, Fabian 2018-03-13 14:35 GMT+01:00 Seth Wiesman <swies...@mediamath.com<mailto:swies...@mediamath.com>>: It turns out the issue was due to our zookeeper installation being in a bad state. I am not clear enough on flink’s networking internals to explain how this manifested as a partition not found exception, but hopefully this can serve as a starting point for other’s who run into the same issue. [cid:image002.png@01D3BB7D.472CF0B0] Seth Wiesman| Software Engineer 4 World Trade Center, 46th Floor, New York, NY 10007 swies...@mediamath.com<mailto:fl...@mediamath.com> From: Seth Wiesman <swies...@mediamath.com<mailto:swies...@mediamath.com>> Date: Friday, March 9, 2018 at 11:53 AM To: "user@flink.apache.org<mailto:user@flink.apache.org>" <user@flink.apache.org<mailto:user@flink.apache.org>> Subject: PartitionNotFoundException when restarting from checkpoint Hi, We are running Flink 1.4.0 with a yarn deployment on ec2 instances, rocks dB and incremental checkpointing, last night a job failed and became stuck in a restart cycle with a PartitionNotFound. We tried restarting the checkpoint on a fresh Flink session with no luck. Looking through the logs we can see that the specified partition is never registered with the ResultPartitionManager. My questions are: 1) Are partitions a part of state or are the ephemeral to the job 2) If they are not part of state, where would the task managers be getting that partition id to begin with 3) Right now we are logging everything under org.apache.flink.runtime.io<http://org.apache.flink.runtime.io>.network, is there anywhere else to look Thank you, [cid:image003.png@01D3BB7D.472CF0B0] Seth Wiesman| Software Engineer 4 World Trade Center, 46th Floor, New York, NY 10007 swies...@mediamath.com<mailto:fl...@mediamath.com>
