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Hudson commented on HBASE-23702: -------------------------------- Results for branch branch-2 [build #2664 on builds.a.o|https://builds.apache.org/job/HBase%20Nightly/job/branch-2/2664/]: (/) *{color:green}+1 overall{color}* ---- details (if available): (/) {color:green}+1 general checks{color} -- For more information [see general report|https://builds.apache.org/job/HBase%20Nightly/job/branch-2/2664/General_20Nightly_20Build_20Report/] (/) {color:green}+1 jdk8 hadoop2 checks{color} -- For more information [see jdk8 (hadoop2) report|https://builds.apache.org/job/HBase%20Nightly/job/branch-2/2664/JDK8_20Nightly_20Build_20Report_20_28Hadoop2_29/] (/) {color:green}+1 jdk8 hadoop3 checks{color} -- For more information [see jdk8 (hadoop3) report|https://builds.apache.org/job/HBase%20Nightly/job/branch-2/2664/JDK8_20Nightly_20Build_20Report_20_28Hadoop3_29/] (/) {color:green}+1 jdk11 hadoop3 checks{color} -- For more information [see jdk11 report|https://builds.apache.org/job/HBase%20Nightly/job/branch-2/2664/JDK11_20Nightly_20Build_20Report_20_28Hadoop3_29/] (/) {color:green}+1 source release artifact{color} -- See build output for details. (/) {color:green}+1 client integration test{color} > `hbase.hstore.flusher.count` setting to 0 breaks HMaster > -------------------------------------------------------- > > Key: HBASE-23702 > URL: https://issues.apache.org/jira/browse/HBASE-23702 > Project: HBase > Issue Type: Bug > Components: regionserver > Environment: HBase-2.2.3 > Java openjdk 1.8.0_222 > Ubuntu 18.04 > Reporter: Ctest > Assignee: Ctest > Priority: Major > Fix For: 3.0.0-alpha-1, 2.3.0, 2.2.5 > > Attachments: HBASE-23702-000.patch, HBASE-23702-000.patch, > HBASE-23702-000.patch, HBASE-23702-000.patch, HBASE-23702-001.patch > > > Summary > The configuration parameter `hbase.hstore.flusher.count` allows `0` (which > turns out to be a bad value after I understand the source code). > When we set `hbase.hstore.flusher.count` to 0, HMaster will fail in 200,000 > ms without any error message, but > ``` > java.lang.RuntimeException: Master not initialized after 200000ms > ``` > > There’s no messages pinpointing `hbase.hstore.flusher.count` being the root > cause. > > 0 means `MemStoreFlusher` is not alive. During the initialization time of > HMaster, `isHealthy()` will be called and it will try to check if > `MemStoreFlusher` is alive or not. However, since we set > `hbase.hstore.flusher.count` to 0, there will be no flusher created at the > first place, which cause`isHealthy()` to return false. As a consequence, > HRegionServer does not enter its main loop. > > *How To Reproduce* > > The version of HBase: 2.2.3 > > # Set the value of configuration parameter `hbase.hstore.flusher.count` to > `0` in “conf/hbase-site.xml” > # Start hbase by running “bin/start-hbase.sh” > # Wait for 3-4 minutes > # Open the log file “logs/hbase-<username>- master -<pcname>.log” -- This message was sent by Atlassian Jira (v8.3.4#803005)