[GitHub] [hbase] busbey commented on a change in pull request #2180: HBASE-24805 HBaseTestingUtility.getConnection should be threadsafe

[GitBox <gi...@apache.org>]

busbey commented on a change in pull request #2180:
URL: https://github.com/apache/hbase/pull/2180#discussion_r463454640



##########
File path: hbase-common/src/test/java/org/apache/hadoop/hbase/HBaseCommonTestingUtility.java
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@@ -69,7 +69,7 @@
     Compression.Algorithm.NONE, Compression.Algorithm.GZ
   };
 
-  protected Configuration conf;
+  protected final Configuration conf;

Review comment:
       Changing this variable to final break binary compatibility, but is needed to make access to this field threadsafe.
   
   I could maintain binary compatibility by making a _new_ final variable called "originalConf" or something like that which is used by our own internals. but that would still cause a behavior change because if someone made a subclass of these classes that assigned to the `conf` variable we would not pay any attention to that change.
   
   I think we should just release note the break, especially given the on-going issue of "should we be labeling these things IA.Public yet?"




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