[hbase] null regioninfo breaks meta scanner
-------------------------------------------
Key: HADOOP-2308
URL: https://issues.apache.org/jira/browse/HADOOP-2308
Project: Hadoop
Issue Type: Bug
Components: contrib/hbase
Reporter: stack
Priority: Minor
Of a sudden, scanner starts reporting below:
{code}
...
2007-11-29 00:23:44,778 DEBUG hbase.HMaster - HMaster.metaScanner scanner:
-6615509571006418923 regioninfo: {regionname:
postlog,img529/6013/46da7e3f111daje2.jpg,1196321411482, startKey:
<img529/6013/46da7e3f111daje2.jpg>, tableDesc: {name: postlog, families:
{cookie:={name: cookie, max versions: 1, compression: NONE, in memory: false,
max length: 2147483647, bloom filter: none}, ip:={name: ip, max versions: 1,
compression: NONE, in memory: false, max length: 2147483647, bloom filter:
none}}}}, server: XX.XX.XX.132:60020, startCode: 1196311486483
2007-11-29 00:23:44,778 DEBUG hbase.HMaster - Checking
postlog,img529/6013/46da7e3f111daje2.jpg,1196321411482 is assigned
2007-11-29 00:23:44,779 DEBUG hbase.HMaster -
HMaster.metaScanner scanner: -6615509571006418923 regioninfo: {regionname:
postlog,img86/3396/batalla4rq3.png,1196321411483, startKey:
<img86/3396/batalla4rq3.png>, tableDesc: {name: postlog, families:
{cookie:={name: cookie, max versions: 1, compression: NONE, in memory: false,
max length: 2147483647, bloom filter: none}, ip:={name: ip, max versions: 1,
compression: NONE, in memory: false, max length: 2147483647, bloom filter:
none}}}}, server: XX.XX.XX.132:60020, startCode: 1196311486483
2007-11-29 00:23:44,779 DEBUG hbase.HMaster - Checking
postlog,img86/3396/batalla4rq3.png,1196321411483 is assigned
2007-11-29 00:23:44,782 DEBUG hbase.HMaster -
HMaster.metaScanner scanner: -6615509571006418923 regioninfo: {regionname:
postlog,img87/3956/20070303003sp5.jpg,1196320397009, startKey:
<img87/3956/20070303003sp5.jpg>, tableDesc: {name: postlog, families:
{cookie:={name: cookie, max versions: 1, compression: NONE, in memory: false,
max length: 2147483647, bloom filter: none}, ip:={name: ip, max versions: 1,
compression: NONE, in memory: false, max length: 2147483647, bloom filter:
none}}}}, server: XX.XX.XX.22:60020, startCode: 1196311486822
2007-11-29 00:23:44,783 DEBUG hbase.HMaster - Checking
postlog,img87/3956/20070303003sp5.jpg,1196320397009 is assigned
2007-11-29 00:23:44,786 ERROR hbase.HMaster - Unexpected
exception
java.lang.IllegalArgumentException: Can't build a writable with empty bytes
array
at org.apache.hadoop.hbase.util.Writables.getWritable(Writables.java:78)
at org.apache.hadoop.hbase.HMaster$BaseScanner.scanRegion(HMaster.java:238)
at
org.apache.hadoop.hbase.HMaster$MetaScanner.scanOneMetaRegion(HMaster.java:695)
at
org.apache.hadoop.hbase.HMaster$MetaScanner.maintenanceScan(HMaster.java:758)
at
org.apache.hadoop.hbase.HMaster$BaseScanner.chore(HMaster.java:202)
at org.apache.hadoop.hbase.Chore.run(Chore.java:58)
2007-11-29 00:23:44,789 INFO hbase.HMaster - HMaster.metaScanner scanning meta
region regionname: .META.,,1, startKey: <>, server: XX.XX.XX.131:60020}
2007-11-29 00:23:44,806 DEBUG hbase.HMaster - HMaster.metaScanner scanner:
-5184039432872494086 regioninfo: {regionname: postlog,,1196314409969, startKey:
<>, tableDesc: {name: postlog, families: {cookie:={name: cookie, max versions:
1, compression: NONE, in memory: false, max length: 2147483647, bloom filter:
none}, ip:={name: ip, max versions: 1, compression: NONE, in memory: false, max
length: 2147483647, bloom filter: none}}}}, server: XX.XX.XX.105:60020,
startCode: 1196311486639
2007-11-29 00:23:44,807 DEBUG hbase.HMaster - Checking
postlog,,1196314409969 is assigned
...
{code}
Keeps at it... then seems to clean itself up after a long time.
Later in the log, we start to have same problem again w/ seemingly different
regioninfo.
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