[HBASE-1936] ClassLoader that loads from hdfs; useful adding filters to classpath without having to restart services - ASF JIRA

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With this patch, customer filters can be dropped into a pre-configured folder (hbase.dynamic.jars.dir), which can be in hdfs. Region servers can pick them up dynamically, no need to restart the cluster for the new filters to take effect.

However, if a filter class is already loaded, it won't be un-loaded. Therefore, we can't load a new version of an existing class. Users have to have a proper way to do filter class versioning.

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With this patch, customer filters can be dropped into a pre-configured folder (hbase.dynamic.jars.dir), which can be in hdfs. Region servers can pick them up dynamically, no need to restart the cluster for the new filters to take effect. However, if a filter class is already loaded, it won't be un-loaded. Therefore, we can't load a new version of an existing class. Users have to have a proper way to do filter class versioning.

is depended upon by

HBASE-1288 Load custom RowFilter dynamically on RegionServers

is related to

HBASE-9532 Dynamic class loader for coprocessor may skip hbase-site.xml

HBASE-8327 Consolidate class loaders

HBASE-6527 Make custom filters plugin

relates to

HBASE-10078 Dynamic Filter - Not using DynamicClassLoader when using FilterList