[ https://issues.apache.org/jira/browse/HDFS-2896?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Eli Collins reassigned HDFS-2896: --------------------------------- Assignee: (was: Eli Collins) > The 2NN incorrectly daemonizes > ------------------------------ > > Key: HDFS-2896 > URL: https://issues.apache.org/jira/browse/HDFS-2896 > Project: Hadoop HDFS > Issue Type: Bug > Components: name-node > Affects Versions: 0.23.0, 0.24.0 > Reporter: Eli Collins > Labels: newbie > > The SecondaryNameNode (and Checkpointer) confuse o.a.h.u.Daemon with a Unix > daemon. Per below it intends to create a thread that never ends, but > o.a.h.u.Daemon just marks a thread with Java's Thread#setDaemon which means > Java will terminate the thread when there are no more non-daemon user threads > running > {code} > // Create a never ending deamon > Daemon checkpointThread = new Daemon(secondary); > {code} > Perhaps they thought they were using commons Daemon. We of course don't want > the 2NN to exit unless it exits itself or is stopped explicitly. Currently it > won't do this because the main thread is not marked as a daemon thread. In > any case, let's make the 2NN consistent with the NN in this regard (exit when > the RPC thread exits). -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira