13bc4fe33c
Only call server.checkIfShouldMoveSystemRegionAsync if a node has been added. Do not call it if only one regionserver in cluster. Make it so ServerCrashProcedure runs before it. Add logging if server.checkIfShouldMoveSystemRegionAsync was responsible for MOVE (Previous was a mystery when it cut in). Previous we'd call it when there was a nodeChildrenChanged. These happen before nodeDeleted. If a server crashed, checkIfShouldMoveSystemRegionAsync could run first, find the server that had not yet registered as crashed, find system tables on it and then try to move them. It would fail because server would not respond to RPC. The region move would then be waiting on the servercrashprocedure to wake it up when done processing but this move had locked the region so SCP couldn't run....
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