[jira] [Created] (HBASE-23702) `hbase.hstore.flusher.count` setting to 0 breaks HMaster

["Ctest (Jira)" <ji...@apache.org>]

Ctest created HBASE-23702:
-----------------------------

             Summary: `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
    Affects Versions: 2.2.3
         Environment: HBase-2.2.3 

Java openjdk 1.8.0_222 

Ubuntu 18.04
            Reporter: Ctest


*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 Hadoop: 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”



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