In the stack trace, I see HFileReaderV1.java I would expect your store files to be upgraded to HFile v2 after cluster upgrade.
Can you tell us more about how you upgraded your clusters ? Thanks On Mon, Mar 4, 2013 at 9:00 AM, Bryan Beaudreault <[email protected]>wrote: > We recently upgraded multiple clusters to CDH 4.2, which comes with hbase > 0.94.2 Since then We've seen region servers die periodically in a way I > never saw before on CDH3. > > Here are the exceptions: > > First I see a slew of these: http://pastebin.com/WqSwMzuZ > > Then the regionserver starts closing all its regions, after throwing this > exception: http://pastebin.com/396wX3iw > > This has now happened on multiple servers across multiple clusters, all cdh > 4.2. > > Any thoughts? During the time our NameNodes seem to be doing fine and I > don't see any issue on our datanodes either. >
