Arkadiusz Gasinski created FLINK-28248:
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Summary: Metaspace memory is leaking when repeatedly submitting
Beam pipelines via the REST API
Key: FLINK-28248
URL: https://issues.apache.org/jira/browse/FLINK-28248
Project: Flink
Issue Type: Bug
Components: API / Core
Affects Versions: 1.14.4
Reporter: Arkadiusz Gasinski
Attachments: image-2022-06-24-14-45-51-689.png
We have a Flink cluster running on k8s/OpenShift in session mode running our
Apache Beam pipelines. Some of these pipelines are streaming pipelines and run
continuously; some are batch pipelines submitted periodically whenever there is
a load to be processed.
We believe that the batch pipelines cause the issue. We submit 1 to several
batch jobs every 5 minutes. For each job, a new instance of the
ChildFirstClassLoader is instantiated and it looks like they are not closed
properly after the job finishes.
Attached is the screenshot from the Eclipse memory analyzer - from the Leak
Suspects report. When the heap dump was captured, there were 2 streaming and
several batch jobs running plus over 100 finished batch jobs.
!image-2022-06-24-14-45-51-689.png!
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