Details
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Bug
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Status: Closed
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Major
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Resolution: Fixed
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None
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None
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Description
The rolling restart script is great for bringing on the weird stuff. On my little loaded cluster if I run it, it horks the cluster and it doesn't recover. I notice two issues that need fixing:
1. We'll miss noticing that a server was carrying .META. and it never gets assigned – the shutdown handlers get stuck in perpetual wait on a .META. assign that will never happen.
2. Perpetual cycling of the this sequence per region not succesfully assigned:
2010-10-23 21:37:57,404 INFO org.apache.hadoop.hbase.master.AssignmentManager: Regions in transition timed out: usertable,user510588360,1287547556587.7f2d92497d2d03917afd574ea2aca55b. state=PENDING_OPEN, ts=1287869814294 45154 2010-10-23 21:37:57,404 INFO org.apache.hadoop.hbase.master.AssignmentManager: Region has been PENDING_OPEN or OPENING for too long, reassigning region=usertable,user510588360,1287547556587. 7f2d92497d2d03917afd574ea2aca55b. 45155 2010-10-23 21:37:57,404 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:60000-0x2bd57d1475046a Attempting to transition node 7f2d92497d2d03917afd574ea2aca55b from RS_ZK_REGION_OPENING to M_ZK_REGION_OFFLINE 45156 2010-10-23 21:37:57,404 WARN org.apache.hadoop.hbase.zookeeper.ZKAssign: master:60000-0x2bd57d1475046a Attempt to transition the unassigned node for 7f2d92497d2d03917afd574ea2aca55b from RS_ZK_REGION_OPENING to M_ZK_REGION_OFFLINE failed, the node existed but was in the state M_ZK_REGION_OFFLINE 45157 2010-10-23 21:37:57,404 INFO org.apache.hadoop.hbase.master.AssignmentManager: Region transitioned OPENING to OFFLINE so skipping timeout, region=usertable,user510588360,1287547556587.7f2d92497d2d03917afd574ea2aca55b. ,,,
Timeout period again elapses an then same sequence.
This is what I've been working on.