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Hudson commented on HADOOP-10597: --------------------------------- SUCCESS: Integrated in Hadoop-Yarn-trunk #907 (See [https://builds.apache.org/job/Hadoop-Yarn-trunk/907/]) HADOOP-10597. RPC Server signals backoff to clients when all request queues are full. (Contributed by Ming Ma) (arp: rev 49f6e3d35e0f89637ae9ea970f249c13bdc0fd49) * hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/CallQueueManager.java * hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/ipc/TestCallQueueManager.java * hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/CommonConfigurationKeys.java * hadoop-common-project/hadoop-common/CHANGES.txt * hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/ipc/TestRPC.java * hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/metrics/RpcMetrics.java * hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/Server.java > RPC Server signals backoff to clients when all request queues are full > ---------------------------------------------------------------------- > > Key: HADOOP-10597 > URL: https://issues.apache.org/jira/browse/HADOOP-10597 > Project: Hadoop Common > Issue Type: Sub-task > Reporter: Ming Ma > Assignee: Ming Ma > Fix For: 2.8.0 > > Attachments: HADOOP-10597-2.patch, HADOOP-10597-3.patch, > HADOOP-10597-4.patch, HADOOP-10597-5.patch, HADOOP-10597-6.patch, > HADOOP-10597.patch, MoreRPCClientBackoffEvaluation.pdf, > RPCClientBackoffDesignAndEvaluation.pdf > > > Currently if an application hits NN too hard, RPC requests be in blocking > state, assuming OS connection doesn't run out. Alternatively RPC or NN can > throw some well defined exception back to the client based on certain > policies when it is under heavy load; client will understand such exception > and do exponential back off, as another implementation of > RetryInvocationHandler. -- This message was sent by Atlassian JIRA (v6.3.4#6332)