Thomas Scott created HDFS-11721:
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Summary: When Standby NameNode is paused using kill -SIGSTOP
clients hang rather than moving to the active.
Key: HDFS-11721
URL: https://issues.apache.org/jira/browse/HDFS-11721
Project: Hadoop HDFS
Issue Type: Bug
Components: hdfs-client
Reporter: Thomas Scott
Priority: Minor
Using kill -SIGSTOP on the standby namenode causes clients to hang rather than
moving to the active. To reproduce:
1. Run kill -SIGSTOP <SBNN pid>
2. Run hdfs dfs -ls / (this may not show the issue as it may try the active
namenode first. If this happens, failover the NameNodes and the issue will
occur)
3. To force the issue run hdfs dfs -ls hdfs://<sbnn ip>:8020/
This causes the client to hang with no timeout until the SBNN is resumed.
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