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From joshelser <...@git.apache.org>
Subject [GitHub] accumulo pull request #260: ACCUMULO-4643 initial implementation
Date Tue, 30 May 2017 16:49:28 GMT
Github user joshelser commented on a diff in the pull request:

    https://github.com/apache/accumulo/pull/260#discussion_r119154379
  
    --- Diff: server/tserver/src/main/java/org/apache/accumulo/tserver/tablet/Tablet.java
---
    @@ -715,47 +722,54 @@ Batch nextBatch(SortedKeyValueIterator<Key,Value> iter, Range
range, int num, Se
     
         long maxResultsSize = tableConfiguration.getAsBytes(Property.TABLE_SCAN_MAXMEM);
     
    -    if (columns.size() == 0) {
    -      iter.seek(range, LocalityGroupUtil.EMPTY_CF_SET, false);
    -    } else {
    -      iter.seek(range, LocalityGroupUtil.families(columns), true);
    -    }
    -
         Key continueKey = null;
         boolean skipContinueKey = false;
     
         boolean endOfTabletReached = false;
    -    while (iter.hasTop()) {
     
    -      value = iter.getTopValue();
    -      key = iter.getTopKey();
    +    try {
    +      if (columns.size() == 0) {
    +        iter.seek(range, LocalityGroupUtil.EMPTY_CF_SET, false);
    --- End diff --
    
    > The key placed in the ScanYieldException is not the start of the initial range. It
is the key where it left off in the underlying scan
    
    You can't guarantee this. What I am saying is: what _if_ the key you see is the same?
    
    Your last comment makes me think that you intend for this exception to never be thrown
when "no progress" was made. If that's correct, documentation needs to adequately warn..


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