Gabriel Reid created HBASE-11110:
------------------------------------
Summary: Ability to load FilterList class is dependent on context
classloader
Key: HBASE-11110
URL: https://issues.apache.org/jira/browse/HBASE-11110
Project: HBase
Issue Type: Bug
Affects Versions: 0.94.19
Reporter: Gabriel Reid
In the 0.94 branch, the FilterList class contains a static call to
HBaseConfiguration.create(). This create call in turn adds the needed hbase
resources to the Configuration object, and sets the classloader of the
Configuration object to be the context classloader of the current thread (if it
isn't null).
This approach causes issues if the FilterList class is loaded from a thread
that has a custom context classloader that doesn't run back up to the main
application classloader. In this case, HBaseConfiguration.checkDefaultsVersion
fails because the hbase.defaults.for.version configuration value can't be found
(because hbase-default.xml can't be found by the custom context classloader).
This is a concrete issue that was discovered via Apache Phoenix within a
commercial tool, when a (JDBC) connection is opened via a pool, and then passed
off to a UI thread that has a custom context classloader. The UI thread is then
the first thing to load FilterList, leading to this issue.
--
This message was sent by Atlassian JIRA
(v6.2#6252)
