Wang Qiang created HBASE-8445:
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Summary: regionserver can't load an updated coprocessor jar with
the same jar path
Key: HBASE-8445
URL: https://issues.apache.org/jira/browse/HBASE-8445
Project: HBase
Issue Type: Bug
Affects Versions: 0.94.5
Reporter: Wang Qiang
Attachments: patch_20130426_01.txt
when I update a coprocessor jar, then I disable and enable the table with the
coprocessor, but the new features in the updated coprocessor jar doesn't make
any sense. Follow into the class
'org.apache.hadoop.hbase.coprocessor.CoprocessorHost', I found that there's a
coprocessor class loader cache , of which the key is the coprocessor jar
path(although the key is a weak reference), so when I disable/enable the table,
it got a cached coprocessor class loader from the cache with the jar path, and
it didn't try to reload the coprocessor jar from the hdfs. Here I give a patch,
in which I add an extra info which is 'FileCheckSum' with the coprocessor class
loader cache, if the checksum is changed, try to reload the jar from the hdfs
path
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