我使用的是3节点hdfs群集，它在过去几个月运行良好，但从几天开始，我经常在其中一个namenode的日志中发现以下异常，它是活动节点，但由于此错误hdfs将自身故障转移到辅助namenode，虽然事情很好，但我想解决这个问题，请suggest:-

org.apache.hadoop.hdfs.server.namenode.TransferFsImage$HttpGetFailedException: Fetch of http://nn1.cluster.com:8480/getJournal?jid=ha-cluster&segmentTxId=827873&storageInfo=-63%3A1513620929%3A0%3ACID-c43f63a9-b064-4dc6-b175-378bf0db96e3 failed with status code 500
Response message:
No realm
    at org.apache.hadoop.hdfs.server.namenode.EditLogFileInputStream$URLLog$1.run(EditLogFileInputStream.java:468)
    at org.apache.hadoop.hdfs.server.namenode.EditLogFileInputStream$URLLog$1.run(EditLogFileInputStream.java:456)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:422)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
    at org.apache.hadoop.security.SecurityUtil.doAsUser(SecurityUtil.java:448)
    at org.apache.hadoop.security.SecurityUtil.doAsCurrentUser(SecurityUtil.java:442)
    at org.apache.hadoop.hdfs.server.namenode.EditLogFileInputStream$URLLog.getInputStream(EditLogFileInputStream.java:455)
    at org.apache.hadoop.hdfs.server.namenode.EditLogFileInputStream.init(EditLogFileInputStream.java:141)
    at org.apache.hadoop.hdfs.server.namenode.EditLogFileInputStream.nextOpImpl(EditLogFileInputStream.java:192)
    at org.apache.hadoop.hdfs.server.namenode.EditLogFileInputStream.nextOp(EditLogFileInputStream.java:250)
    at org.apache.hadoop.hdfs.server.namenode.EditLogInputStream.readOp(EditLogInputStream.java:85)
    at org.apache.hadoop.hdfs.server.namenode.EditLogInputStream.skipUntil(EditLogInputStream.java:151)
    at org.apache.hadoop.hdfs.server.namenode.RedundantEditLogInputStream.nextOp(RedundantEditLogInputStream.java:178)
    at org.apache.hadoop.hdfs.server.namenode.EditLogInputStream.readOp(EditLogInputStream.java:85)
    at org.apache.hadoop.hdfs.server.namenode.EditLogInputStream.skipUntil(EditLogInputStream.java:151)
    at org.apache.hadoop.hdfs.server.namenode.RedundantEditLogInputStream.nextOp(RedundantEditLogInputStream.java:178)
    at org.apache.hadoop.hdfs.server.namenode.EditLogInputStream.readOp(EditLogInputStream.java:85)
    at org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.loadEditRecords(FSEditLogLoader.java:190)
    at org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.loadFSEdits(FSEditLogLoader.java:143)
    at org.apache.hadoop.hdfs.server.namenode.FSImage.loadEdits(FSImage.java:837)
    at org.apache.hadoop.hdfs.server.namenode.FSImage.loadEdits(FSImage.java:818)
    at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer.doTailEdits(EditLogTailer.java:232)
    at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread.doWork(EditLogTailer.java:331)
    at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread.access$200(EditLogTailer.java:284)
    at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread$1.run(EditLogTailer.java:301)
    at org.apache.hadoop.security.SecurityUtil.doAsLoginUserOrFatal(SecurityUtil.java:415)
    at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread.run(EditLogTailer.java:297)
2016-10-14 01:38:32,375 ERROR org.apache.hadoop.hdfs.server.namenode.EditLogInputStream: Got error reading edit log input stream http://nn1.cluster.com:8480/getJournal?jid=ha-cluster&segmentTxId=827873&storageInfo=-63%3A1513620929%3A0%3ACID-c43f63a9-b064-4dc6-b175-378bf0db96e3; failing over to edit log http://nn2.cluster.com:8480/getJournal?jid=ha-cluster&segmentTxId=827873&storageInfo=-63%3A1513620929%3A0%3ACID-c43f63a9-b064-4dc6-b175-378bf0db96e3
org.apache.hadoop.hdfs.server.namenode.RedundantEditLogInputStream$PrematureEOFException: got premature end-of-file at txid 827872; expected file to go up to 827874
    at org.apache.hadoop.hdfs.server.namenode.RedundantEditLogInputStream.nextOp(RedundantEditLogInputStream.java:194)
    at org.apache.hadoop.hdfs.server.namenode.EditLogInputStream.readOp(EditLogInputStream.java:85)
    at org.apache.hadoop.hdfs.server.namenode.EditLogInputStream.skipUntil(EditLogInputStream.java:151)
    at org.apache.hadoop.hdfs.server.namenode.RedundantEditLogInputStream.nextOp(RedundantEditLogInputStream.java:178)
    at org.apache.hadoop.hdfs.server.namenode.EditLogInputStream.readOp(EditLogInputStream.java:85)
    at org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.loadEditRecords(FSEditLogLoader.java:190)
    at org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.loadFSEdits(FSEditLogLoader.java:143)
    at org.apache.hadoop.hdfs.server.namenode.FSImage.loadEdits(FSImage.java:837)
    at org.apache.hadoop.hdfs.server.namenode.FSImage.loadEdits(FSImage.java:818)
    at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer.doTailEdits(EditLogTailer.java:232)
    at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread.doWork(EditLogTailer.java:331)
    at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread.access$200(EditLogTailer.java:284)
    at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread$1.run(EditLogTailer.java:301)
    at org.apache.hadoop.security.SecurityUtil.doAsLoginUserOrFatal(SecurityUtil.java:415)
    at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread.run(EditLogTailer.java:297)