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Jean-Daniel Cryans commented on HBASE-10271: -------------------------------------------- If you are in a hurry to fix 0.94, I'd just revert. The "simple" fix for HBASE-9593 is to restart the master since it clears the in-memory list of online region servers. > [regression] Cannot use the wildcard address since HBASE-9593 > ------------------------------------------------------------- > > Key: HBASE-10271 > URL: https://issues.apache.org/jira/browse/HBASE-10271 > Project: HBase > Issue Type: Bug > Affects Versions: 0.94.13, 0.96.1 > Reporter: Jean-Daniel Cryans > Priority: Critical > Fix For: 0.94.16 > > > HBASE-9593 moved the creation of the ephemeral znode earlier in the region > server startup process such that we don't have access to the ServerName from > the Master's POV. HRS.getMyEphemeralNodePath() calls HRS.getServerName() > which at that point will return this.isa.getHostName(). If you set > hbase.regionserver.ipc.address to 0.0.0.0, you will create a znode with that > address. > What happens next is that the RS will report for duty correctly but the > master will do this: > {noformat} > 2014-01-02 11:45:49,498 INFO [master:172.21.3.117:60000] > master.ServerManager: Registering server=0:0:0:0:0:0:0:0%0,60020,1388691892014 > 2014-01-02 11:45:49,498 INFO [master:172.21.3.117:60000] master.HMaster: > Registered server found up in zk but who has not yet reported in: > 0:0:0:0:0:0:0:0%0,60020,1388691892014 > {noformat} > The cluster is then unusable. > I think a better solution is to track the heartbeats for the region servers > and expire those that haven't checked-in for some time. The 0.89-fb branch > has this concept, and they also use it to detect rack failures: > https://github.com/apache/hbase/blob/0.89-fb/src/main/java/org/apache/hadoop/hbase/master/ServerManager.java#L1224. > In this jira's scope I would just add the heartbeat tracking and add a unit > test for the wildcard address. > What do you think [~rajesh23]? -- This message was sent by Atlassian JIRA (v6.1.5#6160)