[ 
https://issues.apache.org/jira/browse/TEPHRA-214?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15855517#comment-15855517
 ] 

ASF GitHub Bot commented on TEPHRA-214:
---------------------------------------

Github user poornachandra commented on a diff in the pull request:

    https://github.com/apache/incubator-tephra/pull/31#discussion_r99750227
  
    --- Diff: 
tephra-hbase-compat-1.1-base/src/main/java/org/apache/tephra/hbase/txprune/InvalidListPruningDebug.java
 ---
    @@ -0,0 +1,191 @@
    +/*
    + * Licensed to the Apache Software Foundation (ASF) under one
    + * or more contributor license agreements.  See the NOTICE file
    + * distributed with this work for additional information
    + * regarding copyright ownership.  The ASF licenses this file
    + * to you under the Apache License, Version 2.0 (the
    + * "License"); you may not use this file except in compliance
    + * with the License.  You may obtain a copy of the License at
    + *
    + *   http://www.apache.org/licenses/LICENSE-2.0
    + *
    + * Unless required by applicable law or agreed to in writing,
    + * software distributed under the License is distributed on an
    + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    + * KIND, either express or implied.  See the License for the
    + * specific language governing permissions and limitations
    + * under the License.
    + */
    +
    +package org.apache.tephra.hbase.txprune;
    +
    +import com.google.common.collect.MinMaxPriorityQueue;
    +import com.google.gson.Gson;
    +import org.apache.hadoop.conf.Configuration;
    +import org.apache.hadoop.hbase.TableName;
    +import org.apache.hadoop.hbase.client.Connection;
    +import org.apache.hadoop.hbase.client.ConnectionFactory;
    +import org.apache.hadoop.hbase.client.Table;
    +import org.apache.hadoop.hbase.util.Bytes;
    +import org.apache.tephra.TxConstants;
    +import org.apache.tephra.txprune.RegionPruneInfo;
    +import org.slf4j.Logger;
    +import org.slf4j.LoggerFactory;
    +
    +import java.io.IOException;
    +import java.io.PrintWriter;
    +import java.util.Comparator;
    +import java.util.LinkedList;
    +import java.util.List;
    +import java.util.Queue;
    +import javax.annotation.Nullable;
    +
    +/**
    + * Invalid List Pruning Debug Tool.
    + */
    +public class InvalidListPruningDebug {
    +  private static final Logger LOG = 
LoggerFactory.getLogger(InvalidListPruningDebug.class);
    +  private static final Gson GSON = new Gson();
    +  private DataJanitorState dataJanitorState;
    +
    +  /**
    +   * Initialize the Invalid List Debug Tool.
    +   * @param conf {@link Configuration}
    +   * @throws IOException
    +   */
    +  public void initialize(final Configuration conf) throws IOException {
    +    LOG.info("InvalidListPruningDebugMain : initialize method called");
    --- End diff --
    
    This can be changed to debug log


> Provide a way to debug Transaction Pruning progress
> ---------------------------------------------------
>
>                 Key: TEPHRA-214
>                 URL: https://issues.apache.org/jira/browse/TEPHRA-214
>             Project: Tephra
>          Issue Type: Improvement
>            Reporter: Gokul Gunasekaran
>            Assignee: Gokul Gunasekaran
>
> It would be good to get information about what regions are lagging that might 
> be useful to debug why transaction pruning might not be happening. We do 
> print debug information but this method could be invoked on a need-basis 
> outside of the regular pruning operation.



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