saintstack opened a new pull request #995: HBASE-23055 Alter hbase:meta URL: https://github.com/apache/hbase/pull/995 Make it so hbase:meta can be altered. TableState for hbase:meta was hardcoded ENABLED. Make it dynamic. State is now kept in current active Master. It is transient so falls back to default if Master crashes. Add to registry a getMetaTableState which reads mirrored state from zookeeper (NOT from Master and defaults ENABLED if no implementation or error fetching state). hbase:meta schema will be bootstrapped from the filesystem. Changes to filesystem schema are atomic so we should be ok if Master fails mid-edit (TBD). Undoes a bunch of guards that prevented our being able to edit hbase:meta. TODO: Tests, more clarity around hbase:meta table state, and undoing references to hard-coded hbase:meta regioninfo. M hbase-client/src/main/java/org/apache/hadoop/hbase/MetaTableAccessor.java Throw illegal access exception if you try to use MetaTableAccessor getting state of the hbase:meta table. M hbase-client/src/main/java/org/apache/hadoop/hbase/client/ConnectionImplementation.java Add fetching of hbase:meta table state from registry. Adds cache of tablestates w/ a ttl of 1 second (adjustable). M hbase-client/src/main/java/org/apache/hadoop/hbase/client/HBaseAdmin.java M hbase-client/src/main/java/org/apache/hadoop/hbase/client/RawAsyncHBaseAdmin.java Add querying registry for hbase:meta table state. M hbase-client/src/main/java/org/apache/hadoop/hbase/client/ZKAsyncRegistry.java Add querying of mirrored table state for hbase:meta table. M hbase-client/src/main/java/org/apache/hadoop/hbase/zookeeper/ZNodePaths.java Shutdown access. M hbase-server/src/main/java/org/apache/hadoop/hbase/TableDescriptors.java Just cleanup. M hbase-server/src/main/java/org/apache/hadoop/hbase/master/TableStateManager.java Add state holder for hbase:meta. Removed unused methods. M hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/RegionStateStore.java Shut down access. M hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/DisableTableProcedure.java Allow hbase:meta to be disabled. M hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/EnableTableProcedure.java Allow hbase:meta to be enabled.
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