[HBASE-428] Under continuous upload of rows, WrongRegionExceptions are thrown that reach the client even after retries

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.1.0, 0.2.0
• Fix Version/s: 0.2.0
• Component/s: regionserver

Environment

Linux 2.6.9-67.0.1.ELsmp #1 SMP Wed Dec 19 16:01:12 EST 2007 i686 athlon i386 GNU/Linux

• Assignee: Michael Stack
• Reporter: Marc Harris
• Created: 08/Feb/08 14:36
• Updated: 22/Aug/08 21:13
• Resolved: 26/Feb/08 05:10

Description

I have installed 0.16.0 rc 1 which I believe contains a fix for similar issue HBASE-138, but I still see the same problem.

• I am using a single node.
• The client application runs in a single thread, loading data into a single table.
• I get good throughput of about 200 rows/sec to start with, with occasional significant drops due to NotServingRegionException's that are recoverable on client retry (internal to hbase).
• After 54 minutes, and about 500,000 rows I start to see WrongRegionException's in the client application, i.e. real failures. (Note that this compares to 0.15.3 which would being to throw NotServingRegionExceptions after a few tens of thousands of rows).

My data consists of a single table with 5 column families. The data written is as follows:>>
key: a URL
family 1: a small string, often emty, 2 longs, 1 int
family 2: a byte averaging averaging between 1k and 10k, a small string
family 3: several columns with different names per row, values of small strings
family 4: most rows have zero columns, some rows have 1 or more columns with a UL value
The URLs are typically "long-ish" URL as seen when crawling a site, not short home page URLs

I am assuming the data is stored in files of the form <hbaseroot>//<tablename>/<9digitnum>/data/mapfiles/<19digitnum>/data. I have attached a csv file showing the distribution of size of these files. Average size is 19Mb, but the sizes are not evenly distributed at all

Here are two sample exceptions thrown, copied from the region server log:

2008-02-08 02:08:22,495 INFO org.apache.hadoop.ipc.Server: IPC Server handler 4 on 60020, call batchUpdate(pagefetch,http://galsn1.mobilook.mobiwap.com/bm/listproducts;jsessionid=D2ED1EB898163CDB27135DC2CF6958B3.197B?rsi=78011 wap2 20080102052924,1202401088077, 9223372036854775807, org.apache.hadoop.hbase.io.BatchUpdate@feb215) from 66.135.42.137:38484: error: org.apache.hadoop.hbase.WrongRegionException: Requested row out of range for HRegion pagefetch,http://galsn1.mobilook.mobiwap.com/bm/listproducts;jsessionid=D2ED1EB898163CDB27135DC2CF6958B3.197B?rsi=78011 wap2 20080102052924,1202401088077, startKey='http://galsn1.mobilook.mobiwap.com/bm/listproducts;jsessionid=D2ED1EB898163CDB27135DC2CF6958B3.197B?rsi=78011 wap2 20080102052924', getEndKey()='http://galsn1.mobilook.mobiwap.com/bm/listproducts;jsessionid=D2ED1EB898163CDB27135DC2CF6958B3.197B?rsi=78011 wap2 20080102052924', row='http://go2purdue.com/Redeemer_University.cfm?pt=2&sp=2&vid=1199243289_3X02X1468757255&rpt=2&kt=4&kp=1 wap2 20080102081237'
org.apache.hadoop.hbase.WrongRegionException: Requested row out of range for HRegion pagefetch,http://galsn1.mobilook.mobiwap.com/bm/listproducts;jsessionid=D2ED1EB898163CDB27135DC2CF6958B3.197B?rsi=78011 wap2 20080102052924,1202401088077, startKey='http://galsn1.mobilook.mobiwap.com/bm/listproducts;jsessionid=D2ED1EB898163CDB27135DC2CF6958B3.197B?rsi=78011 wap2 20080102052924', getEndKey()='http://galsn1.mobilook.mobiwap.com/bm/listproducts;jsessionid=D2ED1EB898163CDB27135DC2CF6958B3.197B?rsi=78011 wap2 20080102052924', row='http://go2purdue.com/Redeemer_University.cfm?pt=2&sp=2&vid=1199243289_3X02X1468757255&rpt=2&kt=4&kp=1 wap2 20080102081237'
at org.apache.hadoop.hbase.HRegion.checkRow(HRegion.java:1486)
at org.apache.hadoop.hbase.HRegion.obtainRowLock(HRegion.java:1531)
at org.apache.hadoop.hbase.HRegion.batchUpdate(HRegion.java:1226)
at org.apache.hadoop.hbase.HRegionServer.batchUpdate(HRegionServer.java:1433)
at sun.reflect.GeneratedMethodAccessor10.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.hadoop.hbase.ipc.HbaseRPC$Server.call(HbaseRPC.java:413)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:910)
2008-02-08 02:08:22,696 INFO org.apache.hadoop.ipc.Server: IPC Server handler 6 on 60020, call batchUpdate(pagefetch,http://galsn1.mobilook.mobiwap.com/bm/listproducts;jsessionid=D2ED1EB898163CDB27135DC2CF6958B3.197B?rsi=78011 wap2 20080102052924,1202401088077, 9223372036854775807, org.apache.hadoop.hbase.io.BatchUpdate@15d9be1) from 66.135.42.137:38484: error: org.apache.hadoop.hbase.WrongRegionException: Requested row out of range for HRegion pagefetch,http://galsn1.mobilook.mobiwap.com/bm/listproducts;jsessionid=D2ED1EB898163CDB27135DC2CF6958B3.197B?rsi=78011 wap2 20080102052924,1202401088077, startKey='http://galsn1.mobilook.mobiwap.com/bm/listproducts;jsessionid=D2ED1EB898163CDB27135DC2CF6958B3.197B?rsi=78011 wap2 20080102052924', getEndKey()='http://galsn1.mobilook.mobiwap.com/bm/listproducts;jsessionid=D2ED1EB898163CDB27135DC2CF6958B3.197B?rsi=78011 wap2 20080102052924', row='http://go2umass.com/Travel.cfm?pt=2&sp=2&vid=1199230721_3X04X1485302803&rpt=2&kt=5&kp=8 wap2 20080102081239'
org.apache.hadoop.hbase.WrongRegionException: Requested row out of range for HRegion pagefetch,http://galsn1.mobilook.mobiwap.com/bm/listproducts;jsessionid=D2ED1EB898163CDB27135DC2CF6958B3.197B?rsi=78011 wap2 20080102052924,1202401088077, startKey='http://galsn1.mobilook.mobiwap.com/bm/listproducts;jsessionid=D2ED1EB898163CDB27135DC2CF6958B3.197B?rsi=78011 wap2 20080102052924', getEndKey()='http://galsn1.mobilook.mobiwap.com/bm/listproducts;jsessionid=D2ED1EB898163CDB27135DC2CF6958B3.197B?rsi=78011 wap2 20080102052924', row='http://go2umass.com/Travel.cfm?pt=2&sp=2&vid=1199230721_3X04X1485302803&rpt=2&kt=5&kp=8 wap2 20080102081239'
at org.apache.hadoop.hbase.HRegion.checkRow(HRegion.java:1486)
at org.apache.hadoop.hbase.HRegion.obtainRowLock(HRegion.java:1531)
at org.apache.hadoop.hbase.HRegion.batchUpdate(HRegion.java:1226)
at org.apache.hadoop.hbase.HRegionServer.batchUpdate(HRegionServer.java:1433)
at sun.reflect.GeneratedMethodAccessor10.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.hadoop.hbase.ipc.HbaseRPC$Server.call(HbaseRPC.java:413)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:910)