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https://issues.apache.org/jira/browse/HADOOP-11339?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14266338#comment-14266338
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Daryn Sharp commented on HADOOP-11339:
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Sorry, I've been on vacation for weeks. I'm trying catch up!
> Reuse buffer for Hadoop RPC
> ---------------------------
>
> Key: HADOOP-11339
> URL: https://issues.apache.org/jira/browse/HADOOP-11339
> Project: Hadoop Common
> Issue Type: Improvement
> Components: ipc, performance
> Reporter: Yi Liu
> Assignee: Yi Liu
>
> For Hadoop RPCs, we will try to reuse the available connections.
> But when we process each rpc in the same connection, we will allocate a fresh
> heap byte buffer to store the rpc bytes data. The rpc message may be very
> large, i.e., datanode blocks report.
> There is chance to cause full gc as discussed in HDFS-7435
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