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Subject [GitHub] karanmehta93 commented on a change in pull request #419: PHOENIX-4009 Run UPDATE STATISTICS command by using MR integration on…
Date Wed, 09 Jan 2019 05:09:22 GMT
karanmehta93 commented on a change in pull request #419: PHOENIX-4009 Run UPDATE STATISTICS
command by using MR integration on…
URL: https://github.com/apache/phoenix/pull/419#discussion_r246261216
 
 

 ##########
 File path: phoenix-core/src/main/java/org/apache/phoenix/mapreduce/PhoenixRecordReader.java
 ##########
 @@ -108,6 +109,7 @@ public void initialize(InputSplit split, TaskAttemptContext context)
throws IOEx
         final PhoenixInputSplit pSplit = (PhoenixInputSplit)split;
         final List<Scan> scans = pSplit.getScans();
         try {
+            LOG.info("Generating iterators for " + scans.size() + " scans in keyrange: "
+ pSplit.getKeyRange());
 
 Review comment:
   Record reader is initialized once per mapper job and the map jobs are limited by number
of regions. Also these logs will be distributed on several machines and not one. It would
be good to have some insight here on the iterators each reader is trying to generate.

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