In the stack trace, I see HFileReaderV1.java
I would expect your store files to be upgraded to HFile v2 after cluster
Can you tell us more about how you upgraded your clusters ?
On Mon, Mar 4, 2013 at 9:00 AM, Bryan Beaudreault
> 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
> Any thoughts? During the time our NameNodes seem to be doing fine and I
> don't see any issue on our datanodes either.