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https://issues.apache.org/jira/browse/BEAM-9030?focusedWorklogId=371435&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-371435
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ASF GitHub Bot logged work on BEAM-9030:
----------------------------------------
Author: ASF GitHub Bot
Created on: 14/Jan/20 08:33
Start Date: 14/Jan/20 08:33
Worklog Time Spent: 10m
Work Description: sunjincheng121 commented on pull request #10578:
[BEAM-9030] Migrate Beam to use beam-vendor-grpc-1_26_0
URL: https://github.com/apache/beam/pull/10578
As the vendored artifact beam-vendor-grpc-1_26_0 has been released, we can
update the existing source of Beam to use it.
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Issue Time Tracking
-------------------
Worklog Id: (was: 371435)
Time Spent: 6h 10m (was: 6h)
> Bump grpc to 1.26.0
> -------------------
>
> Key: BEAM-9030
> URL: https://issues.apache.org/jira/browse/BEAM-9030
> Project: Beam
> Issue Type: Improvement
> Components: java-fn-execution, runner-flink
> Reporter: sunjincheng
> Assignee: sunjincheng
> Priority: Major
> Time Spent: 6h 10m
> Remaining Estimate: 0h
>
> When submitting a Python word count job to a Flink session/standalone cluster
> repeatedly, the meta space usage of the task manager of the Flink cluster
> will continuously increase (about 40MB each time). The reason is that the
> Beam classes are loaded with the user class loader in Flink and there are
> problems with the implementation of `ProcessManager`(from Beam) and
> `ThreadPoolCache`(from netty) which may cause the user class loader could not
> be garbage collected even after the job finished which causes the meta space
> memory leak eventually. You can refer to FLINK-15338[1] for more information.
> Regarding to `ProcessManager`, I have created a JIRA BEAM-9006[2] to track
> it. Regarding to `ThreadPoolCache`, it is a Netty problem and has been fixed
> in NETTY#8955[3]. Netty 4.1.35 Final has already included this fix and GRPC
> 1.22.0 has already dependents on Netty 4.1.35 Final. So we need to bump the
> version of GRPC to 1.22.0+ (currently 1.21.0).
>
> What do you think?
> [1] https://issues.apache.org/jira/browse/FLINK-15338
> [2] https://issues.apache.org/jira/browse/BEAM-9006
> [3] [https://github.com/netty/netty/pull/8955]
>
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