svn commit: r1746115 - in /jackrabbit/oak/branches/1.2: ./ oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/segment/file/TarReader.java

[al...@apache.org]

Author: alexparvulescu
Date: Mon May 30 12:24:09 2016
New Revision: 1746115

URL: http://svn.apache.org/viewvc?rev=1746115&view=rev
Log:
OAK-3502 Improve logging during cleanup
 - merged r1707753


Modified:
    jackrabbit/oak/branches/1.2/   (props changed)
    jackrabbit/oak/branches/1.2/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/segment/file/TarReader.java

Propchange: jackrabbit/oak/branches/1.2/
------------------------------------------------------------------------------
--- svn:mergeinfo (original)
+++ svn:mergeinfo Mon May 30 12:24:09 2016
@@ -1,4 +1,4 @@
 /jackrabbit/oak/branches/1.0:1665962
 /jackrabbit/oak/branches/1.4:1745750
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+/jackrabbit/oak/trunk:1672350,1672468,1672537,1672603,1672611,1672642,1672644,1672834-1672835,1673351,1673410,1673414-1673415,1673436,1673644,1673662-1673664,1673669,1673695,1673713,1673738,1673787,1673791,1674046,1674065,1674075,1674107,1674228,1674780,1674880,1675054-1675055,1675319,1675332,1675354,1675357,1675382,1675555,1675566,1675593,1676198,1676237,1676407,1676458,1676539,1676670,1676693,1676703,1676725,1677579,1677581,1677609,1677611,1677774,1677788,1677797,1677804,1677806,1677939,1677991,1678023,1678095-1678096,1678124,1678171,1678173,1678202,1678211,1678323,1678758,1678938,1678954,1679144,1679165,1679191,1679232,1679235,1679503,1679958,1679961,1680170,1680172,1680182,1680222,1680232,1680236,1680461,1680633,1680643,1680747,1680805-1680806,1680903,1681282,1681767,1681918,1681921,1681955,1682042,1682218,1682235,1682437,1682488,1682494,1682555,1682855,1682904,1683059,1683089,1683213,1683249,1683259,1683278,1683323,1683687,1683700,1684174-1684175,1684186,1684376,1684442,1684561
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 /jackrabbit/trunk:1345480

Modified: jackrabbit/oak/branches/1.2/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/segment/file/TarReader.java
URL: http://svn.apache.org/viewvc/jackrabbit/oak/branches/1.2/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/segment/file/TarReader.java?rev=1746115&r1=1746114&r2=1746115&view=diff
==============================================================================
--- jackrabbit/oak/branches/1.2/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/segment/file/TarReader.java (original)
+++ jackrabbit/oak/branches/1.2/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/segment/file/TarReader.java Mon May 30 12:24:09 2016
@@ -576,6 +576,9 @@ class TarReader {
      */
     synchronized TarReader cleanup(Set<UUID> referencedIds, CompactionMap cm, Set<UUID> removed)
             throws IOException {
+        String name = file.getName();
+        log.debug("Cleaning up {}", name);
+
         Set<UUID> cleaned = newHashSet();
         Map<UUID, List<UUID>> graph = getGraph();
 
@@ -632,7 +635,7 @@ class TarReader {
         size += 2 * BLOCK_SIZE;
 
         if (count == 0) {
-            // none of the entries within this tar file are referenceable
+            log.debug("None of the entries of {} are referenceable.", name);
             removed.addAll(cleaned);
             logCleanedSegments(cleaned);
             return null;
@@ -641,23 +644,25 @@ class TarReader {
             // unless this tar file lacks a pre-compiled segment graph
             // in which case we'll always generate a new tar file with
             // the graph to speed up future garbage collection runs.
+            log.debug("Not enough space savings. ({}/{}). Skipping clean up of {}",
+                    access.length() - size, access.length(), name);
             return this;
         }
 
-        String name = file.getName();
         int pos = name.length() - "a.tar".length();
         char generation = name.charAt(pos);
         if (generation == 'z') {
-            // no garbage collection after reaching generation z
+            log.debug("No garbage collection after reaching generation z: {}", name);
             return this;
         }
 
         File newFile = new File(
                 file.getParentFile(),
                 name.substring(0, pos) + (char) (generation + 1) + ".tar");
+
+        log.debug("Writing new generation {}", newFile.getName());
         TarWriter writer = new TarWriter(newFile);
-        for (int i = 0; i < sorted.length; i++) {
-            TarEntry entry = sorted[i];
+        for (TarEntry entry : sorted) {
             if (entry != null) {
                 byte[] data = new byte[entry.size()];
                 access.read(entry.offset(), entry.size()).get(data);