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Add Fail-Fast to Procedures by throwing exception out of Procedure constructor so if move but table is disabled or if master is going down, etc., we can give notice before the procedure is scheduled. Will help guard against scheduling Procedures that will have a hard time succeeding; e.g. a move when table is offline. Also fixed bug around table state where we presumed ENABLED though no entry in hbase:meta (we were using this mechanism for whether a table existed or not). M hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionMove.java Test stolen from HBASE-20131 M hbase-client/src/main/java/org/apache/hadoop/hbase/client/TableState.java Add convenience isEnabled/isDisabled M hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java Promote assert state to throw exception. M hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterServices.java Add isClusterUp M hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/AssignmentManager.java Move constructor now throws exception M hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/MoveRegionProcedure.java M hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/MergeTableRegionsProcedure.java M hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/SplitTableRegionProcedure.java M hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/DisableTableProcedure.java M hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/ModifyTableProcedure.java M hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/RestoreSnapshotProcedure.java M hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/TruncateTableProcedure.java Do environment check at construction and fail-fast if hostile. M hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/AbstractStateMachineTableProcedure.java Add preflightCheck utility method. M hbase-client/src/main/java/org/apache/hadoop/hbase/MetaTableAccessor.java Removed setting time setting table state; broke when using other than default environment edge masked by presumption that no state meant active.
Apache HBase [1] is an open-source, distributed, versioned, column-oriented store modeled after Google' Bigtable: A Distributed Storage System for Structured Data by Chang et al.[2] Just as Bigtable leverages the distributed data storage provided by the Google File System, HBase provides Bigtable-like capabilities on top of Apache Hadoop [3]. To get started using HBase, the full documentation for this release can be found under the doc/ directory that accompanies this README. Using a browser, open the docs/index.html to view the project home page (or browse to [1]). The hbase 'book' at http://hbase.apache.org/book.html has a 'quick start' section and is where you should being your exploration of the hbase project. The latest HBase can be downloaded from an Apache Mirror [4]. The source code can be found at [5] The HBase issue tracker is at [6] Apache HBase is made available under the Apache License, version 2.0 [7] The HBase mailing lists and archives are listed here [8]. The HBase distribution includes cryptographic software. See the export control notice here [9]. 1. http://hbase.apache.org 2. http://research.google.com/archive/bigtable.html 3. http://hadoop.apache.org 4. http://www.apache.org/dyn/closer.cgi/hbase/ 5. https://hbase.apache.org/source-repository.html 6. https://hbase.apache.org/issue-tracking.html 7. http://hbase.apache.org/license.html 8. http://hbase.apache.org/mail-lists.html 9. https://hbase.apache.org/export_control.html