Bashar Abdul Jawad created FLINK-11665:
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Summary: Flink failing to remove a JobGraph from ZK even though it reports it did
Key: FLINK-11665
URL:
https://issues.apache.org/jira/browse/FLINK-11665 Project: Flink
Issue Type: Bug
Components: JobManager
Affects Versions: 1.5.5
Reporter: Bashar Abdul Jawad
We recently have seen the following issue with Flink 1.5.5:
Given Flink Job ID 1d24cad26843dcebdfca236d5e3ad82a:
1- A job is activated successfully and the job graph added to ZK:
{code:java}
Added SubmittedJobGraph(1d24cad26843dcebdfca236d5e3ad82a, null) to ZooKeeper.
{code}
2- Job is deactivated, Flink reports that the job graph has been successfully removed from ZK and the blob is deleted from the blob server (in this case S3):
{code:java}
Removed job graph 1d24cad26843dcebdfca236d5e3ad82a from ZooKeeper.
{code}
3- JM is later restarted, Flink for some reason attempts to recover the job that it reported earlier it has removed from ZK but since the blob has already been deleted the JM goes into a crash loop. The only to recover it to manually remove the job graph entry from ZK:
{code:java}
Recovered SubmittedJobGraph(1d24cad26843dcebdfca236d5e3ad82a, null).
{code}
and
{code:java}
org.apache.flink.fs.s3presto.shaded.com.amazonaws.services.s3.model.AmazonS3Exception: The specified key does not exist. (Service: Amazon S3; Status Code: 404; Error Code: NoSuchKey; Request ID: 1BCDFD83FC4546A2), S3 Extended Request ID: OzZtMbihzCm1LKy99s2+rgUMxyll/xYmL6ouMvU2eo30wuDbUmj/DAWoTCs9pNNCLft0FWqbhTo= (Path: s3://blam-state-staging/flink/default/blob/job_1d24cad26843dcebdfca236d5e3ad82a/blob_p-c51b25cc0b20351f6e32a628bb6e674ee48a273e-ccfa96b0fd795502897c73714185dde3)
{code}
My question is under what circumstances would this happen? this seems to happen very infrequently but since the consequence is severe (JM crash loop) we'd like to understand how it would happen.
This all seems a little similar to
https://issues.apache.org/jira/browse/FLINK-9575 but that issue is reported fixed in Flink 1.5.2 and we are already on Flink 1.5.5
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