[jira] [Created] (HDFS-16415) Namenode has stoped when it wrote metadata to JournalNode happend timeout Exception

["yangzhanling (Jira)" <ji...@apache.org>]

yangzhanling created HDFS-16415:
-----------------------------------

             Summary: Namenode has stoped when it wrote metadata to JournalNode happend timeout Exception
                 Key: HDFS-16415
                 URL: https://issues.apache.org/jira/browse/HDFS-16415
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: namanode
    Affects Versions: 2.7.7
         Environment: org.apache.hadoop.hdfs.qjournal.client.QuorumCall#waitFor

//when happend FULL GC spent some time ,rem < 0,so timeoutException, namenode stoped

if (rem <= 0) {
    throw new TimeoutException();
}
            Reporter: yangzhanling


NameNode has stoped when it wrote metadata to JournalNode happend timeout exception,it is ok normally, _because have been well protected with meta data in namenode._

_But when wait the respoonse for JorunalNode, it will be Full GC as quick as a flash and it spent a lot time,then  the timeout exception has happened ,and Namenode has stoped, so it was unstable, and unreliable._



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