ZanderXu created HADOOP-18389:
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Summary: Limit stacked call of one connection in client to avoid
possible oom in server
Key: HADOOP-18389
URL: https://issues.apache.org/jira/browse/HADOOP-18389
Project: Hadoop Common
Issue Type: Bug
Reporter: ZanderXu
Assignee: ZanderXu
Attachments: image-2022-08-04-00-22-28-865.png,
image-2022-08-04-00-23-18-427.png
In our prod environment, we encountered an accident that JN OOM because
Server#Connection#responseQueue used 97% memory.
After analyzed the memory of JN and found that there are 2w+ called stacked in
one Server#Connection#responseQueue, because the network between NN and JN
jitters with some tcp packet loss.
!image-2022-08-04-00-22-28-865.png|width=561,height=254!
!image-2022-08-04-00-23-18-427.png|width=559,height=356!
In this case, I think Client.java should support limit the stacked calls of one
connection to avoid the possible OOM in Server. When the number of stacked
calls is more than the limit size, we can just throw one IOException to the
method caller.
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