zlzhang0122 created FLINK-23194:
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Summary: Cache and reuse the ContainerLaunchContext and accelarate
the progress of createTaskExecutorLaunchContext on yarn
Key: FLINK-23194
URL: https://issues.apache.org/jira/browse/FLINK-23194
Project: Flink
Issue Type: Improvement
Components: Deployment / YARN
Affects Versions: 1.12.4, 1.13.1
Reporter: zlzhang0122
Fix For: 1.14.0
When starting the TaskExecutor in container on yarn, this will create
ContainerLaunchContext for n times(n represent the number of the TaskManager).
When I examine the progress of this creation, I found that most of them were in
common and have nothing to do with the particular TaskManager except the
launchCommand. We can create ContainerLaunchContext once and reuse it. Only the
launchCommand need to create separately for every particular TaskManager.
So I propose that we can cache and reuse the ContainerLaunchContext object to
accelerate this creation progress.
I think this can have some benefit like below:
# this can accelerate the creation of ContainerLaunchContext and also the
start of the TaskExecutor, especially under the situation of massive
TaskManager.
# this can decrease the pressure of the HDFS, etc.
# this can also avoid the suddenly failure of the HDFS or yarn, etc.
We have implemented this on our production environment. So far there has no
problem and have a good benefit. Let me know if there's any point that I
haven't considered.
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