There could be more than one reason where RegionTooBusyException is thrown. Below are two (from HRegion):
* We throw RegionTooBusyException if above memstore limit * and expect client to retry using some kind of backoff */ private void checkResources() * Try to acquire a lock. Throw RegionTooBusyException * if failed to get the lock in time. Throw InterruptedIOException * if interrupted while waiting for the lock. */ private void lock(final Lock lock, final int multiplier) How many tasks may write to this row concurrently ? Which 0.98 release are you using ? Cheers On Mon, Nov 10, 2014 at 11:10 AM, Brian Jeltema < brian.jelt...@digitalenvoy.net> wrote: > I’m running a map/reduce job against a table that is performing a large > number of writes (probably updating every row). > The job is failing with the exception below. This is a solid failure; it > dies at the same point in the application, > and at the same row in the table. So I doubt it’s a conflict with > compaction (and the UI shows no compaction in progress), > or that there is a load-related cause. > > ‘hbase hbck’ does not report any inconsistencies. The > ‘waitForAllPreviousOpsAndReset’ leads me to suspect that > there is operation in progress that is hung and blocking the update. I > don’t see anything suspicious in the HBase logs. > The data at the point of failure is not unusual, and is identical to many > preceding rows. > Does anybody have any ideas of what I should look for to find the cause of > this RegionTooBusyException? > > This is Hadoop 2.4 and HBase 0.98. > > 14/11/10 13:46:13 INFO mapreduce.Job: Task Id : > attempt_1415210751318_0010_m_000314_1, Status : FAILED > Error: > org.apache.hadoop.hbase.client.RetriesExhaustedWithDetailsException: Failed > 1744 actions: RegionTooBusyException: 1744 times, > at > org.apache.hadoop.hbase.client.AsyncProcess$BatchErrors.makeException(AsyncProcess.java:207) > at > org.apache.hadoop.hbase.client.AsyncProcess$BatchErrors.access$1700(AsyncProcess.java:187) > at > org.apache.hadoop.hbase.client.AsyncProcess.waitForAllPreviousOpsAndReset(AsyncProcess.java:1568) > at > org.apache.hadoop.hbase.client.HTable.backgroundFlushCommits(HTable.java:1023) > at org.apache.hadoop.hbase.client.HTable.doPut(HTable.java:995) > at org.apache.hadoop.hbase.client.HTable.put(HTable.java:953) > > Brian
