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From matthpeterson <...@git.apache.org>
Subject [GitHub] accumulo pull request #270: ACCUMULO-4657 Reduce excessive logging / logging...
Date Tue, 20 Jun 2017 17:40:18 GMT
Github user matthpeterson commented on a diff in the pull request:

    https://github.com/apache/accumulo/pull/270#discussion_r123045425
  
    --- Diff: server/base/src/main/java/org/apache/accumulo/server/util/MetadataTableUtil.java
---
    @@ -894,12 +894,19 @@ public static void removeBulkLoadEntries(Connector conn, String
tableId, long ti
             BatchWriter bw = conn.createBatchWriter(MetadataTable.NAME, new BatchWriterConfig()))
{
           mscanner.setRange(new KeyExtent(tableId, null, null).toMetadataRange());
           mscanner.fetchColumnFamily(TabletsSection.BulkFileColumnFamily.NAME);
    +      boolean shouldTrace = log.isTraceEnabled();
    +      String tidString = Long.toString(tid);
           for (Entry<Key,Value> entry : mscanner) {
    -        log.debug("Looking at entry " + entry + " with tid " + tid);
    -        if (Long.parseLong(entry.getValue().toString()) == tid) {
    -          log.debug("deleting entry " + entry);
    -          Mutation m = new Mutation(entry.getKey().getRow());
    -          m.putDelete(entry.getKey().getColumnFamily(), entry.getKey().getColumnQualifier());
    +        if (shouldTrace) {
    +          log.trace("Looking at entry " + entry + " with tid " + tidString);
    --- End diff --
    
    Yes it was related to the forced logger:
    org.apache.log4j.Category.callAppenders(Category:204)
    waiting for lock .. (a org.apache.log4j.Logger)
    ..Category.forcedLog..
    ..Category.debug..
    ... removeBulkEntries(MetadataTableUtil.java:911)
    
    Yes, it looks like the slf4j implementation I checked avoids the forceLog call and instead
checks against the level which would not block.


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