记录一次HDFS RPC返回Response过程慢导致的性能问题

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发布时间：2019-03-05

本文共 946 字，大约阅读时间需要 3 分钟。

HDFS NameNode?????????????????

??HDFS????????NameNode???????????????????????????????????????????????????????????????????????????????????????????????

NameNode????????

NameNode????????????????

NameNode????Full GC???GC?????????????????????????????

NameNode??????????????????????????

Handler??????????????????????????????

????????????Handler????????????????????Handler????????????

RPC??????????

????????????????Handler?????????????????????????????????????????

???????????

??????????????????????????????HDFS-9198?HADOOP-10300????????????????

????????

PostponeRpcCallQueueProcessingThread??????????RPC???

?????????? RPC ???

???????

? RPC ???????????????

? RPC ????????????????????

????

?? writeLock ? readLock ???????????

??????????????????

??????

??????????????

?????????????????

???????

???????????????????NameNode??????????????????????????????????????????????????????

??

????????????????????NameNode??????????????????????????????????????????????????

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