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https://issues.apache.org/jira/browse/HADOOP-11339?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14226074#comment-14226074
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Yi Liu commented on HADOOP-11339:
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For the buffer, the rpc data size may be different, so it's hard to reuse as a
single byte array.
Currently in my initial patch, I write a chunked byte array, when the new rpc
message is larger, we allocate new chunk.
Thoughts?
> 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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