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https://issues.apache.org/jira/browse/HADOOP-20047?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Siyao Meng reassigned HADOOP-20047:
-----------------------------------
Assignee: Siyao Meng
> RetryInvocationHandler leaves the call id set when an attempt issues no RPC
> ---------------------------------------------------------------------------
>
> Key: HADOOP-20047
> URL: https://issues.apache.org/jira/browse/HADOOP-20047
> Project: Hadoop Common
> Issue Type: Bug
> Components: common, ipc
> Affects Versions: 3.5.0, 3.4.3
> Reporter: Siyao Meng
> Assignee: Siyao Meng
> Priority: Major
> Labels: pull-request-available
>
> RetryInvocationHandler sets the thread local call id and retry count in
> Client before every attempt on an RPC proxy, but only the creation of a
> Client.Call clears the call id. When an attempt issues no RPC, the call id
> stays set and the next attempt on that thread fails in
> Client.setCallIdAndRetryCount:
> {noformat}
> java.lang.IllegalStateException
> at
> org.apache.hadoop.util.Preconditions.checkState(Preconditions.java:254)
> at org.apache.hadoop.ipc.Client.setCallIdAndRetryCount(Client.java:164)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invokeMethod(RetryInvocationHandler.java:167)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invoke(RetryInvocationHandler.java:162)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invokeOnce(RetryInvocationHandler.java:100)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:366)
> {noformat}
> Attempts that issue no RPC include calling toString or hashCode on the retry
> proxy (noted in HDFS-8409), and a protocol translator or
> ProtobufRpcEngine2.Invoker throwing before Client.call. After that, the retry
> is aborted and the next call through any retry proxy on the same thread
> fails. Asynchronous calls retry on the handler's own thread, so later calls
> on that handler fail as well.
> The code is in hadoop-common, so this affects every RetryProxy over a Hadoop
> RPC proxy, including HDFS clients (HDFS-8409, HDFS-11351) and YARN (RMProxy,
> ServerProxy). Apache Ozone fixed the same fault in its copy of this code in
> HDDS-16745.
> Proposed fix: clear the call id, retry count and external handler after every
> attempt that set them, with a regression test in TestRetryProxy.
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