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https://issues.apache.org/jira/browse/HBASE-428?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stack updated HBASE-428:
------------------------
Attachment: 428-v3.patch
v3 has more cleanup. Fixes rare case where if a store file had a single entry
only, we were overwriting the calculated midKey for the region (could be whats
wrong w/ our midkey calc. but wouldn't want to bet on it -- seems like too rare
an occurance).
M src/java/org/apache/hadoop/hbase/HStoreFile.java
(finalKey) Removed checkKey if trying to get finalKey on top-half
of a HalfMapFile. Was failing because it would compare the
HalfMapFile midkey to the empty passed key into which we're to
set the mapfile last key.
M src/java/org/apache/hadoop/hbase/HStore.java
If a return is being done inside the 'if' of an 'if/else', then
the else is not needed. Fixed two of these. Removed commented
out logging. Rewrote a cumbersome if/else as a ?:.
Removed unused rowKey assignment. Removed unnecessary casts.
Renamed localvariable midkey as mk because it was too close
to the passed in arg midKey. Do NOT copy
midkey/mk before test that it was equal to start/end keys. A
store could have a midkey/mk that equaled region start/end keys
and we were nonetheless overwriting midKey, the passed in
arg.
M src/java/org/apache/hadoop/hbase/HRegionServer.java
Removed commented out code. Output full regioninfo when splitting
so can see start and end keys, etc.
M src/java/org/apache/hadoop/hbase/HRegion.java
If end or start key matches mid key, don't split.
> Under continuous upload of rows, WrongRegionExceptions are thrown that reach
> the client even after retries
> ----------------------------------------------------------------------------------------------------------
>
> Key: HBASE-428
> URL: https://issues.apache.org/jira/browse/HBASE-428
> Project: Hadoop HBase
> Issue Type: Bug
> Components: regionserver
> Affects Versions: 0.1.0, 0.2.0
> Environment: Linux 2.6.9-67.0.1.ELsmp #1 SMP Wed Dec 19 16:01:12 EST
> 2007 i686 athlon i386 GNU/Linux
> Reporter: Marc Harris
> Assignee: stack
> Priority: Blocker
> Attachments: 428-2.patch, 428-v3.patch, 428.patch, filesbysize.csv,
> lsr, selectfrommeta.txt
>
>
> 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, [EMAIL PROTECTED])
> 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, [EMAIL PROTECTED])
> 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)
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