[hbase] branch branch-2.3 updated: HBASE-23702 hbase.hstore.flusher.count setting to 0 breaks HMaster (#1703)

[zghao]

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zghao pushed a commit to branch branch-2.3
in repository https://gitbox.apache.org/repos/asf/hbase.git


The following commit(s) were added to refs/heads/branch-2.3 by this push:
     new 20557c0  HBASE-23702 hbase.hstore.flusher.count setting to 0 breaks 
HMaster (#1703)
20557c0 is described below

commit 20557c05105e95b79f3deb2ae4741c8f1be81200
Author: Guanghao Zhang <zg...@apache.org>
AuthorDate: Fri May 15 09:05:25 2020 +0800

    HBASE-23702 hbase.hstore.flusher.count setting to 0 breaks HMaster (#1703)
    
    Co-authored-by: Ctest
    Signed-off-by: Anoop Sam John <anoop.hb...@gmail.com>
    Signed-off-by: Wellington Chevreuil <wchevre...@apache.org>
---
 .../java/org/apache/hadoop/hbase/regionserver/MemStoreFlusher.java   | 5 +++++
 1 file changed, 5 insertions(+)

diff --git 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MemStoreFlusher.java
 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MemStoreFlusher.java
index 39b0368..fcff217 100644
--- 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MemStoreFlusher.java
+++ 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MemStoreFlusher.java
@@ -128,6 +128,11 @@ class MemStoreFlusher implements FlushRequester {
     this.blockingWaitTime = conf.getInt("hbase.hstore.blockingWaitTime",
       90000);
     int handlerCount = conf.getInt("hbase.hstore.flusher.count", 2);
+    if (handlerCount < 1) {
+      LOG.warn("hbase.hstore.flusher.count was configed to {} which is less 
than 1, corrected to 1",
+          handlerCount);
+      handlerCount = 1;
+    }
     this.flushHandlers = new FlushHandler[handlerCount];
     LOG.info("globalMemStoreLimit="
         + TraditionalBinaryPrefix