We need more context to help (software versions, numbers of servers and type, etc.).
For sure you've read and have implemented all in the requirements section here: http://hbase.apache.org/docs/r0.20.5/api/overview-summary.html#overview_description? In particular the ulimit and xceiver stuff? Are you swapping? Thanks, St.Ack On Tue, Jul 13, 2010 at 5:43 AM, Yabo Xu <[email protected]> wrote: > Hi all: > > We applied hadoop/hbase for NLP analysis and intermediate data storage, and > encountered a string of problems when the data scale is up. > > Attached is a region server log that shows how it crashed after running a > mapreduce task with intensive read/writes. > > The FATAL error seems to occur at the following line: > > "2010-07-13 18:02:56,723 FATAL > org.apache.hadoop.hbase.regionserver.MemcacheFlusher: Replay of hlog > required. Forcing server shutdown" > > But before this, there are many warning or errors on reading/creating new > blocks. > > We have been struggling on this for a while, but could not identify how to > fix the problem. Wonder if anybody can help us take a look at the log and > check out the problem? > Thanks in advance. > > > > Best, > Arber > > > > > > >
