[ https://issues.apache.org/jira/browse/HBASE-15835?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Daniel Vimont updated HBASE-15835: ---------------------------------- Attachment: HBASE-15835-v1.patch > HBaseTestingUtility#startMiniCluster throws "HMasterAddress already in use" > RuntimeException when a local instance of HBase is running > -------------------------------------------------------------------------------------------------------------------------------------- > > Key: HBASE-15835 > URL: https://issues.apache.org/jira/browse/HBASE-15835 > Project: HBase > Issue Type: Bug > Components: API > Affects Versions: 2.0.0 > Reporter: Daniel Vimont > Assignee: Daniel Vimont > Labels: easyfix > Fix For: 2.0.0 > > Attachments: HBASE-15835-v1.patch > > > When a MiniCluster is being started with the > {{HBaseTestUtility#startMiniCluster}} method (most typically in the context > of JUnit testing), if a local HBase instance is already running (or for that > matter, another thread with another MiniCluster is already running), the > startup will fail with a RuntimeException saying "HMasterAddress already in > use", referring explicitly to contention for the same default master info > port (16010). > This problem most recently came up in conjunction with HBASE-14876 and its > sub-JIRAs (development of new HBase-oriented Maven archetypes), but this is > apparently a known issue to veteran developers, who tend to set up the > @BeforeClass sections of their test modules with code similar to the > following: > {code} > UTIL = HBaseTestingUtility.createLocalHTU(); > // disable UI's on test cluster. > UTIL.getConfiguration().setInt("hbase.master.info.port", -1); > UTIL.getConfiguration().setInt("hbase.regionserver.info.port", -1); > UTIL.startMiniCluster(); > {code} > A comprehensive solution modeled on this should be put directly into > HBaseTestUtility's main constructor, using one of the following options: > OPTION 1 (always force random port assignment): > {code} > this.getConfiguration().setInt(HConstants.MASTER_INFO_PORT, -1); > this.getConfiguration().setInt(HConstants.REGIONSERVER_PORT, -1); > {code} > OPTION 2 (always force random port assignment if user has not explicitly > defined alternate port): > {code} > Configuration conf = this.getConfiguration(); > if (conf.getInt(HConstants.MASTER_INFO_PORT, > HConstants.DEFAULT_MASTER_INFOPORT) > == HConstants.DEFAULT_MASTER_INFOPORT) { > conf.setInt(HConstants.MASTER_INFO_PORT, -1); > } > if (conf.getInt(HConstants.REGIONSERVER_PORT, > HConstants.DEFAULT_REGIONSERVER_PORT) > == HConstants.DEFAULT_REGIONSERVER_PORT) { > conf.setInt(HConstants.REGIONSERVER_PORT, -1); > } > {code} -- This message was sent by Atlassian JIRA (v6.3.4#6332)