Author: mreutegg
Date: Thu Nov 23 08:25:33 2017
New Revision: 1816107

URL: http://svn.apache.org/viewvc?rev=1816107&view=rev
Log:
OAK-4518: ConcurrentAddReferenceTest fails occasionally

Merged revisions 1750656,1753481 from trunk

Added:
    
jackrabbit/oak/branches/1.2/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/ConcurrentReadAndAddTest.java
      - copied, changed from r1750656, 
jackrabbit/oak/trunk/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/ConcurrentReadAndAddTest.java
Modified:
    jackrabbit/oak/branches/1.2/   (props changed)
    jackrabbit/oak/branches/1.2/oak-core/   (props changed)
    
jackrabbit/oak/branches/1.2/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/DocumentMK.java
    
jackrabbit/oak/branches/1.2/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/DocumentNodeStore.java
    
jackrabbit/oak/branches/1.2/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/DocumentNodeStoreService.java
    
jackrabbit/oak/branches/1.2/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/VersionGarbageCollector.java
    
jackrabbit/oak/branches/1.2/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/AbstractJournalTest.java
    
jackrabbit/oak/branches/1.2/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/VersionGCDeletionTest.java
    
jackrabbit/oak/branches/1.2/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/mongo/JournalIT.java

Propchange: jackrabbit/oak/branches/1.2/
------------------------------------------------------------------------------
--- svn:mergeinfo (original)
+++ svn:mergeinfo Thu Nov 23 08:25:33 2017
@@ -1,4 +1,4 @@
 /jackrabbit/oak/branches/1.0:1665962
 
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 /jackrabbit/trunk:1345480

Propchange: jackrabbit/oak/branches/1.2/oak-core/
------------------------------------------------------------------------------
--- svn:mergeinfo (original)
+++ svn:mergeinfo Thu Nov 23 08:25:33 2017
@@ -1,5 +1,5 @@
 /jackrabbit/oak/branches/1.0/oak-core:1665962
 
/jackrabbit/oak/branches/1.4/oak-core:1745750,1747354,1750078,1750512,1790375,1803776,1805392,1805400,1805402
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3209,1693401,1693421,1693525-1693526,1694007,1694049,1694393-1694394,1694651,1694653-1694654,1695032,1695050,1695122,1695223,1695280,1695299,1695420,1695457,1695482,1695492,1695507,1695521,1695540,1695571,1695829-1695830,1695905,1696190,1696194,1696242,1696285,1696375,1696522,1696578,1696759,1696916,1697363,1697373,1697383,1697410,1697579,1697582,1697589,1697616,1697672,1697896,1698096,1698144,1700191,1700231,1700397,1700403,1700506,1700571,1700709,1700718,1700720,1700727,1700749,1700769,1700775,1701065,1701613,1701619,1701733,1701743,1701750,1701768,1701806,1701810,1701814,1701907,1701948,1701955,1701959,1701965,1701986,1702014,1702022,1702045,1702051,1702241,1702272,1702371,1702387,1702405,1702423,1702426,1702428,1702860,1702866,1702942,1702960,1703212,1703382,1703395,1703411,1703428,1703430,1703568,1703592,1703758,1703858,1703878,1704256,1704282,1704285,1704457,1704479,1704490,1704614,1704629,1704636,1704655,1704670,1704886,1705005,1705027,1705043,1705055,1705250,1705268,1705273,
 
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32170,1732268,1732278,1732330,1732418,1732435,1732647-1732648,1732864,1733615,1733929,1734230,1734254,1735052,1735081,1735109,1735141,1735267,1735405,1735484,1735549,1735564,1735588,1735919,1736176,1737309-1737310,1737334,1737349,1738138,1738252,1738833,1738950,1738957,1739712,1739760,1739867,1739894,1739959-1739960,1740114,1740116,1740250,1740333,1740360,1740626,1740774,1740837,1740971,1741016,1741032,1741339,1741343,1742117,1742520,1742888,1742916,1743097,1743172,1743343,1743674,1744265,1744292,1744589,1744670,1744672,1744959,1745038,1745127,1745197,1745336,1746117,1746408,1746696,1746981,1747341-1747342,1747380,1747387,1747406,1747492,1747654,1748505,1748553,1748722,1748870,1749350,1749464,1749475,1749645,1749662,1749815,1749872,1749875,1749899,1750052,1750076-1750077,1750287,1750457,1750462,1750465,1750495,1750626,1750809,1750886,1751376,1751410,1751445-1751446,1751478,1751755,1751871,1752198,1752202,1752273-1752274,1752438,1752508,1752659,1752672,1753262,1753331-1753332,1753355
 
,1753444,1754117,1754239,1755366,1756520,1756580,1757119,1757166,1759433,1760340,1760373,1760387,1760677,1760701,1760709,1760946,1761444,1761571,1761762,1761787,1761866,1763347,1763378,1763735,1764705,1765817,1765983,1766071,1766496,1766554,1766644,1767025,1767265,1767502,1768446,1768637,1769939-1769940,1770694,1771739,1774141,1774256,1775474,1775622,1775757,1780543,1781068,1781075,1781386,1781846,1782476,1782966,1783066,1783089,1783104-1783105,1783110,1783619,1783855,1784023,1784130,1784251,1784401,1784574,1785283,1787074,1789056,1792463,1792742,1793013,1793088,1793644,1795314,1795613,1795618,1796144,1798035,1798834,1799924,1801011,1801013,1807308,1808125,1808240,1808246,1809024,1809026,1809163
+/jackrabbit/oak/trunk/oak-core:1672350,1672468-1672469,1672537,1672603,1672611,1672642,1672644,1672834-1672835,1673351,1673410,1673414-1673415,1673436,1673644,1673662-1673664,1673669,1673695,1673713,1673738,1673787,1673791,1674046,1674065,1674075,1674107,1674228,1674780,1674880,1675054-1675055,1675089,1675319,1675332,1675354,1675357,1675382,1675555,1675566,1675593,1676198,1676237,1676407,1676458,1676539,1676670,1676693,1676703,1676725,1677579,1677581,1677609,1677611,1677774,1677788,1677797,1677804,1677806,1677939,1677991,1678023,1678095-1678096,1678124,1678171,1678173,1678202,1678211,1678323,1678758,1678938,1678954,1679144,1679165,1679191,1679232,1679235,1679503,1679958,1679961,1680170,1680172,1680182,1680222,1680232,1680236,1680461,1680633,1680643,1680747,1680805-1680806,1680903,1681282,1681767,1681918,1681921,1681955,1682042,1682218,1682235,1682437,1682488,1682494,1682555,1682855,1682904,1683059,1683089,1683213,1683249,1683259,1683278,1683323,1683687,1683700,1684174-1684175,168418
 
6,1684376,1684442,1684561,1684570,1684601,1684618,1684669,1684820,1684868,1684894,1685023,1685075,1685370,1685541,1685552,1685589-1685590,1685834,1685839-1685840,1685964,1685977,1685989,1685999,1686003,1686023,1686032,1686097,1686162,1686229,1686234,1686253,1686414,1686772,1686780,1686790,1686854,1686857,1686971,1687053-1687055,1687175,1687196,1687198,1687220,1687239-1687240,1687301,1687441,1687553,1688089-1688090,1688172,1688179,1688349,1688421,1688436,1688453,1688616,1688622,1688634,1688636,1688817,1689003-1689004,1689008,1689577,1689581,1689623,1689810,1689828,1689831,1689833,1689903,1690017,1690043,1690047,1690057,1690247,1690249,1690634-1690637,1690650,1690657,1690669,1690672,1690674,1690885,1690941,1691139,1691151,1691159,1691167,1691183,1691188,1691201,1691210,1691217-1691218,1691280,1691307,1691331-1691333,1691345,1691384-1691385,1691394,1691401,1691498,1691509,1692133-1692134,1692156,1692250,1692272,1692274,1692363,1692382,1692393,1692478,1692955,1693002,1693030,1693050,169
 
3209,1693401,1693421,1693525-1693526,1694007,1694049,1694393-1694394,1694651,1694653-1694654,1695032,1695050,1695122,1695223,1695280,1695299,1695420,1695457,1695482,1695492,1695507,1695521,1695540,1695571,1695829-1695830,1695905,1696190,1696194,1696242,1696285,1696375,1696522,1696578,1696759,1696916,1697363,1697373,1697383,1697410,1697579,1697582,1697589,1697616,1697672,1697896,1698096,1698144,1700191,1700231,1700397,1700403,1700506,1700571,1700709,1700718,1700720,1700727,1700749,1700769,1700775,1701065,1701613,1701619,1701733,1701743,1701750,1701768,1701806,1701810,1701814,1701907,1701948,1701955,1701959,1701965,1701986,1702014,1702022,1702045,1702051,1702241,1702272,1702371,1702387,1702405,1702423,1702426,1702428,1702860,1702866,1702942,1702960,1703212,1703382,1703395,1703411,1703428,1703430,1703568,1703592,1703758,1703858,1703878,1704256,1704282,1704285,1704457,1704479,1704490,1704614,1704629,1704636,1704655,1704670,1704886,1705005,1705027,1705043,1705055,1705250,1705268,1705273,
 
1705323,1705677,1705701,1705871,1705992,1705998,1706009,1706037,1706059,1706212,1706218,1706270,1706764,1706772,1707049,1707189,1707191,1707223,1707331,1707435,1707509,1707753,1708049,1708105,1708307,1708315,1708401,1708546,1708592,1708738,1708766,1709012,1709852,1709978,1710013,1710031,1710049,1710205,1710242,1710559,1710575,1710590,1710614,1710637,1710789,1710800,1710811,1710816,1710972,1711209,1711248,1711282,1711296,1711405,1711498,1711654,1712018,1712042,1712319,1712490,1712531,1712730,1712785,1712963,1713008,1713439,1713461,1713580,1713586,1713599-1713600,1713626,1713698,1713803,1713809,1714034,1714061,1714084,1714170,1714174,1714213,1714229,1714238,1714519-1714520,1714543-1714544,1714730,1714739,1714779,1714827,1714956,1714961,1715010,1715092,1715191,1715346,1715716,1715767,1715771,1715888,1715898,1716100,1716178,1716426,1716576,1716588-1716589,1716596,1716616,1716703,1716712,1716815,1716823,1716830,1716840,1716845,1716883,1717177,1717203,1717277,1717393-1717394,1717410,17174
 
62,1717632,1717768-1717769,1717784,1717789,1717988,1718528,1718533,1718546-1718548,1718553,1718626,1718646,1718772,1718801-1718802,1718895,1719111,1719288,1719869,1720306,1720335,1720350,1720354,1720500,1721160,1721172,1721337,1722141,1722832,1723227,1723239,1723241,1723251,1723254,1723333,1723347,1723350,1723565,1723584,1723713,1723731,1724026,1724057,1724186,1724210,1724401,1724628,1724631,1725216,1725477,1725515,1725555,1725895,1725899,1725935,1725941,1725960,1726232,1726237,1726570,1726579,1726585-1726586,1726621,1726795,1726797,1726809,1726812,1726981,1726993,1727026,1727149,1727254,1727331,1727350,1727358,1727429,1727476,1727483,1727508,1727515-1727518,1727813,1727816,1727831-1727832,1727841,1727893,1727895,1727912-1727913,1727923,1727991,1728037,1728041,1728070,1728114,1728281,1728294-1728297,1728300,1728443,1728525,1728642,1729200,1729505,1729578,1729599,1729957,1729962,1729979,1730050,1730216,1730527,1730581,1730629,1730801,1731627,1731647-1731648,1731789,1731797,1732131,17
 
32170,1732268,1732278,1732330,1732418,1732435,1732647-1732648,1732864,1733615,1733929,1734230,1734254,1735052,1735081,1735109,1735141,1735267,1735405,1735484,1735549,1735564,1735588,1735919,1736176,1737309-1737310,1737334,1737349,1738138,1738252,1738833,1738950,1738957,1739712,1739760,1739867,1739894,1739959-1739960,1740114,1740116,1740250,1740333,1740360,1740626,1740774,1740837,1740971,1741016,1741032,1741339,1741343,1742117,1742520,1742888,1742916,1743097,1743172,1743343,1743674,1744265,1744292,1744589,1744670,1744672,1744959,1745038,1745127,1745197,1745336,1746117,1746408,1746696,1746981,1747341-1747342,1747380,1747387,1747406,1747492,1747654,1748505,1748553,1748722,1748870,1749350,1749464,1749475,1749645,1749662,1749815,1749872,1749875,1749899,1750052,1750076-1750077,1750287,1750457,1750462,1750465,1750495,1750626,1750656,1750809,1750886,1751376,1751410,1751445-1751446,1751478,1751755,1751871,1752198,1752202,1752273-1752274,1752438,1752508,1752659,1752672,1753262,1753331-1753332
 
,1753355,1753444,1753481,1754117,1754239,1755366,1756520,1756580,1757119,1757166,1759433,1760340,1760373,1760387,1760677,1760701,1760709,1760946,1761444,1761571,1761762,1761787,1761866,1763347,1763378,1763735,1764705,1765817,1765983,1766071,1766496,1766554,1766644,1767025,1767265,1767502,1768446,1768637,1769939-1769940,1770694,1771739,1774141,1774256,1775474,1775622,1775757,1780543,1781068,1781075,1781386,1781846,1782476,1782966,1783066,1783089,1783104-1783105,1783110,1783619,1783855,1784023,1784130,1784251,1784401,1784574,1785283,1787074,1789056,1792463,1792742,1793013,1793088,1793644,1795314,1795613,1795618,1796144,1798035,1798834,1799924,1801011,1801013,1807308,1808125,1808240,1808246,1809024,1809026,1809163
 
/jackrabbit/oak/trunk/oak-store-document:1809866,1811575,1811702,1811709,1815450,1815466
 /jackrabbit/trunk/oak-core:1345480

Modified: 
jackrabbit/oak/branches/1.2/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/DocumentMK.java
URL: 
http://svn.apache.org/viewvc/jackrabbit/oak/branches/1.2/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/DocumentMK.java?rev=1816107&r1=1816106&r2=1816107&view=diff
==============================================================================
--- 
jackrabbit/oak/branches/1.2/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/DocumentMK.java
 (original)
+++ 
jackrabbit/oak/branches/1.2/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/DocumentMK.java
 Thu Nov 23 08:25:33 2017
@@ -532,7 +532,6 @@ public class DocumentMK implements Micro
         private int nodeCachePercentage = DEFAULT_NODE_CACHE_PERCENTAGE;
         private int childrenCachePercentage = 
DEFAULT_CHILDREN_CACHE_PERCENTAGE;
         private int diffCachePercentage = DEFAULT_DIFF_CACHE_PERCENTAGE;
-        private int docChildrenCachePercentage = 
DEFAULT_DOC_CHILDREN_CACHE_PERCENTAGE;
         private int cacheSegmentCount = DEFAULT_CACHE_SEGMENT_COUNT;
         private int cacheStackMoveDistance = DEFAULT_CACHE_STACK_MOVE_DISTANCE;
         private boolean useSimpleRevision;
@@ -768,21 +767,31 @@ public class DocumentMK implements Micro
 
         public Builder memoryCacheDistribution(int nodeCachePercentage,
                                                int childrenCachePercentage,
-                                               int docChildrenCachePercentage,
                                                int diffCachePercentage) {
             checkArgument(nodeCachePercentage >= 0);
             checkArgument(childrenCachePercentage>= 0);
-            checkArgument(docChildrenCachePercentage >= 0);
             checkArgument(diffCachePercentage >= 0);
             checkArgument(nodeCachePercentage + childrenCachePercentage +
-                    docChildrenCachePercentage + diffCachePercentage < 100);
+                    diffCachePercentage < 100);
             this.nodeCachePercentage = nodeCachePercentage;
             this.childrenCachePercentage = childrenCachePercentage;
-            this.docChildrenCachePercentage = docChildrenCachePercentage;
             this.diffCachePercentage = diffCachePercentage;
             return this;
         }
 
+        /**
+         * @deprecated Use {@link #memoryCacheDistribution(int, int, int)}
+         *  instead. As of 1.2.28, this method ignores the
+         *  {@code docChildrenCachePercentage}.
+         */
+        public Builder memoryCacheDistribution(int nodeCachePercentage,
+                                               int childrenCachePercentage,
+                                               int docChildrenCachePercentage,
+                                               int diffCachePercentage) {
+            return memoryCacheDistribution(nodeCachePercentage,
+                    childrenCachePercentage, diffCachePercentage);
+        }
+
         public long getNodeCacheSize() {
             return memoryCacheSize * nodeCachePercentage / 100;
         }
@@ -793,11 +802,7 @@ public class DocumentMK implements Micro
 
         public long getDocumentCacheSize() {
             return memoryCacheSize - getNodeCacheSize() - 
getChildrenCacheSize()
-                    - getDiffCacheSize() - getDocChildrenCacheSize();
-        }
-
-        public long getDocChildrenCacheSize() {
-            return memoryCacheSize * docChildrenCachePercentage / 100;
+                    - getDiffCacheSize();
         }
 
         public long getDiffCacheSize() {
@@ -897,10 +902,6 @@ public class DocumentMK implements Micro
             return buildCache(CacheType.CHILDREN, getChildrenCacheSize(), 
null, null);
         }
 
-        public Cache<StringValue, NodeDocument.Children> 
buildDocChildrenCache() {
-            return buildCache(CacheType.DOC_CHILDREN, 
getDocChildrenCacheSize(), null, null);
-        }
-
         public Cache<PathRev, StringValue> buildMemoryDiffCache() {
             return buildCache(CacheType.DIFF, getMemoryDiffCacheSize(), null, 
null);
         }

Modified: 
jackrabbit/oak/branches/1.2/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/DocumentNodeStore.java
URL: 
http://svn.apache.org/viewvc/jackrabbit/oak/branches/1.2/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/DocumentNodeStore.java?rev=1816107&r1=1816106&r2=1816107&view=diff
==============================================================================
--- 
jackrabbit/oak/branches/1.2/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/DocumentNodeStore.java
 (original)
+++ 
jackrabbit/oak/branches/1.2/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/DocumentNodeStore.java
 Thu Nov 23 08:25:33 2017
@@ -18,7 +18,6 @@ package org.apache.jackrabbit.oak.plugin
 
 import static com.google.common.base.Preconditions.checkArgument;
 import static com.google.common.base.Preconditions.checkNotNull;
-import static com.google.common.collect.Iterables.filter;
 import static com.google.common.collect.Iterables.toArray;
 import static com.google.common.collect.Iterables.transform;
 import static java.util.Collections.singletonList;
@@ -31,8 +30,6 @@ import static org.apache.jackrabbit.oak.
 import static 
org.apache.jackrabbit.oak.plugins.document.JournalEntry.fillExternalChanges;
 import static org.apache.jackrabbit.oak.plugins.document.UpdateOp.Key;
 import static org.apache.jackrabbit.oak.plugins.document.UpdateOp.Operation;
-import static 
org.apache.jackrabbit.oak.plugins.document.util.Utils.asStringValueIterable;
-import static 
org.apache.jackrabbit.oak.plugins.document.util.Utils.getIdFromPath;
 import static org.apache.jackrabbit.oak.plugins.document.util.Utils.pathToId;
 
 import java.io.Closeable;
@@ -46,7 +43,6 @@ import java.util.HashMap;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
-import java.util.NavigableSet;
 import java.util.Set;
 import java.util.SortedMap;
 import java.util.TimeZone;
@@ -67,9 +63,7 @@ import javax.annotation.Nullable;
 import javax.management.NotCompliantMBeanException;
 
 import com.google.common.base.Function;
-import com.google.common.base.Predicates;
 import com.google.common.cache.Cache;
-import com.google.common.collect.Iterables;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Maps;
 import com.google.common.collect.Sets;
@@ -97,9 +91,7 @@ import org.apache.jackrabbit.oak.api.Com
 import org.apache.jackrabbit.oak.cache.CacheStats;
 import org.apache.jackrabbit.oak.commons.PathUtils;
 import org.apache.jackrabbit.oak.json.BlobSerializer;
-import org.apache.jackrabbit.oak.plugins.document.Branch.BranchCommit;
 import 
org.apache.jackrabbit.oak.plugins.document.util.LoggingDocumentStoreWrapper;
-import org.apache.jackrabbit.oak.plugins.document.util.StringValue;
 import 
org.apache.jackrabbit.oak.plugins.document.util.TimingDocumentStoreWrapper;
 import org.apache.jackrabbit.oak.plugins.document.util.Utils;
 import org.apache.jackrabbit.oak.spi.blob.GarbageCollectableBlobStore;
@@ -323,14 +315,6 @@ public final class DocumentNodeStore
     private final CacheStats nodeChildrenCacheStats;
 
     /**
-     * Child doc cache.
-     *
-     * Key: StringValue, value: Children
-     */
-    private final Cache<StringValue, NodeDocument.Children> docChildrenCache;
-    private final CacheStats docChildrenCacheStats;
-
-    /**
      * The change log to keep track of commits for diff operations.
      */
     private final DiffCache diffCache;
@@ -444,10 +428,6 @@ public final class DocumentNodeStore
         nodeChildrenCacheStats = new CacheStats(nodeChildrenCache, 
"Document-NodeChildren",
                 builder.getWeigher(), builder.getChildrenCacheSize());
 
-        docChildrenCache = builder.buildDocChildrenCache();
-        docChildrenCacheStats = new CacheStats(docChildrenCache, 
"Document-DocChildren",
-                builder.getWeigher(), builder.getDocChildrenCacheSize());
-
         diffCache = builder.getDiffCache();
         checkpoints = new Checkpoints(this);
 
@@ -737,10 +717,6 @@ public final class DocumentNodeStore
         return nodeChildrenCacheStats;
     }
 
-    public CacheStats getDocChildrenCacheStats() {
-        return docChildrenCacheStats;
-    }
-
     @Nonnull
     public Iterable<CacheStats> getDiffCacheStats() {
         return diffCache.getStats();
@@ -754,10 +730,6 @@ public final class DocumentNodeStore
         return nodeChildrenCache;
     }
 
-    void invalidateDocChildrenCache() {
-        docChildrenCache.invalidateAll();
-    }
-
     void invalidateNodeChildrenCache() {
         nodeChildrenCache.invalidateAll();
     }
@@ -854,6 +826,7 @@ public final class DocumentNodeStore
         }
     }
 
+    @Nonnull
     DocumentNodeState.Children getChildren(@Nonnull final DocumentNodeState 
parent,
                               @Nullable final String name,
                               final int limit)
@@ -976,71 +949,7 @@ public final class DocumentNodeStore
         } else {
             from = Utils.getKeyLowerLimit(path);
         }
-        if (name != null || limit > NUM_CHILDREN_CACHE_LIMIT) {
-            // do not use cache when there is a lower bound name
-            // or more than 16k child docs are requested
-            return store.query(Collection.NODES, from, to, limit);
-        }
-        final StringValue key = new StringValue(path);
-        // check cache
-        NodeDocument.Children c = docChildrenCache.getIfPresent(key);
-        if (c == null) {
-            c = new NodeDocument.Children();
-            List<NodeDocument> docs = store.query(Collection.NODES, from, to, 
limit);
-            for (NodeDocument doc : docs) {
-                String p = doc.getPath();
-                c.childNames.add(PathUtils.getName(p));
-            }
-            c.isComplete = docs.size() < limit;
-            docChildrenCache.put(key, c);
-            return docs;
-        } else if (c.childNames.size() < limit && !c.isComplete) {
-            // fetch more and update cache
-            String lastName = c.childNames.get(c.childNames.size() - 1);
-            String lastPath = concat(path, lastName);
-            String low = Utils.getIdFromPath(lastPath);
-            int remainingLimit = limit - c.childNames.size();
-            List<NodeDocument> docs = store.query(Collection.NODES,
-                    low, to, remainingLimit);
-            NodeDocument.Children clone = c.clone();
-            for (NodeDocument doc : docs) {
-                String p = doc.getPath();
-                clone.childNames.add(PathUtils.getName(p));
-            }
-            clone.isComplete = docs.size() < remainingLimit;
-            docChildrenCache.put(key, clone);
-            c = clone;
-        }
-        Iterable<NodeDocument> head = filter(transform(c.childNames,
-                new Function<String, NodeDocument>() {
-            @Override
-            public NodeDocument apply(String name) {
-                String p = concat(path, name);
-                NodeDocument doc = store.find(Collection.NODES, 
Utils.getIdFromPath(p));
-                if (doc == null) {
-                    docChildrenCache.invalidate(key);
-                }
-                return doc;
-            }
-        }), Predicates.notNull());
-        Iterable<NodeDocument> it;
-        if (c.isComplete) {
-            it = head;
-        } else {
-            // OAK-2420: 'head' may have null documents when documents are
-            // concurrently removed from the store. concat 'tail' to fetch
-            // more documents if necessary
-            final String last = getIdFromPath(concat(
-                    path, c.childNames.get(c.childNames.size() - 1)));
-            Iterable<NodeDocument> tail = new Iterable<NodeDocument>() {
-                @Override
-                public Iterator<NodeDocument> iterator() {
-                    return store.query(NODES, last, to, limit).iterator();
-                }
-            };
-            it = Iterables.concat(head, tail);
-        }
-        return Iterables.limit(it, limit);
+        return store.query(Collection.NODES, from, to, limit);
     }
 
     /**
@@ -1165,41 +1074,6 @@ public final class DocumentNodeStore
             w.tag('^').key(PathUtils.getName(p)).object().endObject();
         }
         cacheEntry.append(path, w.toString());
-
-        // update docChildrenCache
-        if (!added.isEmpty()) {
-            StringValue docChildrenKey = new StringValue(path);
-            NodeDocument.Children docChildren = 
docChildrenCache.getIfPresent(docChildrenKey);
-            if (docChildren != null) {
-                int currentSize = docChildren.childNames.size();
-                NavigableSet<String> names = 
Sets.newTreeSet(docChildren.childNames);
-                // incomplete cache entries must not be updated with
-                // names at the end of the list because there might be
-                // a next name in DocumentStore smaller than the one added
-                if (!docChildren.isComplete) {
-                    for (String childPath : added) {
-                        String name = PathUtils.getName(childPath);
-                        if (names.higher(name) != null) {
-                            names.add(Utils.unshareString(name));
-                        }
-                    }
-                } else {
-                    // add all
-                    for (String childPath : added) {
-                        
names.add(Utils.unshareString(PathUtils.getName(childPath)));
-                    }
-                }
-                // any changes?
-                if (names.size() != currentSize) {
-                    // create new cache entry with updated names
-                    boolean complete = docChildren.isComplete;
-                    docChildren = new NodeDocument.Children();
-                    docChildren.isComplete = complete;
-                    docChildren.childNames.addAll(names);
-                    docChildrenCache.put(docChildrenKey, docChildren);
-                }
-            }
-        }
     }
 
     /**
@@ -1933,33 +1807,13 @@ public final class DocumentNodeStore
                 if (externalSort == null) {
                     // if no externalSort available, then invalidate the 
classic way: everything
                     stats.cacheStats = store.invalidateCache();
-                    docChildrenCache.invalidateAll();
                 } else {
                     try {
                         externalSort.sort();
                         stats.cacheStats = 
store.invalidateCache(pathToId(externalSort));
-                        // OAK-3002: only invalidate affected items (using 
journal)
-                        long origSize = docChildrenCache.size();
-                        if (origSize == 0) {
-                            // if docChildrenCache is empty, don't bother
-                            // calling invalidateAll either way
-                            // (esp calling invalidateAll(Iterable) will
-                            // potentially iterate over all keys even though
-                            // there's nothing to be deleted)
-                            LOG.trace("backgroundRead: docChildrenCache 
nothing to invalidate");
-                        } else {
-                            // however, if the docChildrenCache is not empty,
-                            // use the invalidateAll(Iterable) variant,
-                            // passing it a Iterable<StringValue>, as that's
-                            // what is contained in the cache
-                            
docChildrenCache.invalidateAll(asStringValueIterable(externalSort));
-                            long newSize = docChildrenCache.size();
-                            LOG.trace("backgroundRead: docChildrenCache 
invalidation result: orig: {}, new: {} ", origSize, newSize);
-                        }
                     } catch (Exception ioe) {
                         LOG.error("backgroundRead: got IOException during 
external sorting/cache invalidation (as a result, invalidating entire cache): 
"+ioe, ioe);
                         stats.cacheStats = store.invalidateCache();
-                        docChildrenCache.invalidateAll();
                     }
                 }
                 stats.cacheInvalidationTime = clock.getTime() - time;

Modified: 
jackrabbit/oak/branches/1.2/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/DocumentNodeStoreService.java
URL: 
http://svn.apache.org/viewvc/jackrabbit/oak/branches/1.2/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/DocumentNodeStoreService.java?rev=1816107&r1=1816106&r2=1816107&view=diff
==============================================================================
--- 
jackrabbit/oak/branches/1.2/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/DocumentNodeStoreService.java
 (original)
+++ 
jackrabbit/oak/branches/1.2/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/DocumentNodeStoreService.java
 Thu Nov 23 08:25:33 2017
@@ -24,10 +24,8 @@ import static org.apache.jackrabbit.oak.
 import static org.apache.jackrabbit.oak.commons.PropertiesUtil.toLong;
 import static 
org.apache.jackrabbit.oak.plugins.document.DocumentMK.Builder.DEFAULT_CHILDREN_CACHE_PERCENTAGE;
 import static 
org.apache.jackrabbit.oak.plugins.document.DocumentMK.Builder.DEFAULT_DIFF_CACHE_PERCENTAGE;
-import static 
org.apache.jackrabbit.oak.plugins.document.DocumentMK.Builder.DEFAULT_DOC_CHILDREN_CACHE_PERCENTAGE;
 import static 
org.apache.jackrabbit.oak.plugins.document.DocumentMK.Builder.DEFAULT_NODE_CACHE_PERCENTAGE;
 import static 
org.apache.jackrabbit.oak.spi.whiteboard.WhiteboardUtils.registerMBean;
-import static 
org.apache.jackrabbit.oak.spi.whiteboard.WhiteboardUtils.scheduleWithFixedDelay;
 
 import java.io.ByteArrayInputStream;
 import java.io.IOException;
@@ -156,12 +154,6 @@ public class DocumentNodeStoreService {
     )
     private static final String PROP_DIFF_CACHE_PERCENTAGE = 
"diffCachePercentage";
     
-    @Property(intValue = 
DocumentMK.Builder.DEFAULT_DOC_CHILDREN_CACHE_PERCENTAGE,
-            label = "Document Children Cache",
-            description = "Percentage of cache to be allocated towards 
Document children cache"
-    )
-    private static final String PROP_DOC_CHILDREN_CACHE_PERCENTAGE = 
"docChildrenCachePercentage";
-
     @Property(intValue = DocumentMK.Builder.DEFAULT_CACHE_SEGMENT_COUNT,
             label = "LIRS Cache Segment Count",
             description = "The number of segments in the LIRS cache " + 
@@ -353,7 +345,6 @@ public class DocumentNodeStoreService {
         int cacheSize = toInteger(prop(PROP_CACHE), DEFAULT_CACHE);
         int nodeCachePercentage = toInteger(prop(PROP_NODE_CACHE_PERCENTAGE), 
DEFAULT_NODE_CACHE_PERCENTAGE);
         int childrenCachePercentage = 
toInteger(prop(PROP_CHILDREN_CACHE_PERCENTAGE), 
DEFAULT_CHILDREN_CACHE_PERCENTAGE);
-        int docChildrenCachePercentage = 
toInteger(prop(PROP_DOC_CHILDREN_CACHE_PERCENTAGE), 
DEFAULT_DOC_CHILDREN_CACHE_PERCENTAGE);
         int diffCachePercentage = toInteger(prop(PROP_DIFF_CACHE_PERCENTAGE), 
DEFAULT_DIFF_CACHE_PERCENTAGE);
         int blobCacheSize = toInteger(prop(PROP_BLOB_CACHE_SIZE), 
DEFAULT_BLOB_CACHE_SIZE);
         String persistentCache = 
PropertiesUtil.toString(prop(PROP_PERSISTENT_CACHE), DEFAULT_PERSISTENT_CACHE);
@@ -366,7 +357,6 @@ public class DocumentNodeStoreService {
                 memoryCacheDistribution(
                         nodeCachePercentage, 
                         childrenCachePercentage, 
-                        docChildrenCachePercentage, 
                         diffCachePercentage).
                 setCacheSegmentCount(cacheSegmentCount).
                 setCacheStackMoveDistance(cacheStackMoveDistance);
@@ -557,13 +547,6 @@ public class DocumentNodeStoreService {
                         CacheStatsMBean.TYPE,
                         store.getNodeChildrenCacheStats().getName())
         );
-        registrations.add(
-                registerMBean(whiteboard,
-                        CacheStatsMBean.class,
-                        store.getDocChildrenCacheStats(),
-                        CacheStatsMBean.TYPE,
-                        store.getDocChildrenCacheStats().getName())
-        );
         for (CacheStats cs : store.getDiffCacheStats()) {
             registrations.add(
                     registerMBean(whiteboard,

Modified: 
jackrabbit/oak/branches/1.2/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/VersionGarbageCollector.java
URL: 
http://svn.apache.org/viewvc/jackrabbit/oak/branches/1.2/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/VersionGarbageCollector.java?rev=1816107&r1=1816106&r2=1816107&view=diff
==============================================================================
--- 
jackrabbit/oak/branches/1.2/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/VersionGarbageCollector.java
 (original)
+++ 
jackrabbit/oak/branches/1.2/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/VersionGarbageCollector.java
 Thu Nov 23 08:25:33 2017
@@ -154,7 +154,6 @@ public class VersionGarbageCollector {
 
             gc.removeDocuments(stats);
 
-            nodeStore.invalidateDocChildrenCache();
             stats.deleteDeletedDocs.stop();
         } finally {
             gc.close();

Modified: 
jackrabbit/oak/branches/1.2/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/AbstractJournalTest.java
URL: 
http://svn.apache.org/viewvc/jackrabbit/oak/branches/1.2/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/AbstractJournalTest.java?rev=1816107&r1=1816106&r2=1816107&view=diff
==============================================================================
--- 
jackrabbit/oak/branches/1.2/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/AbstractJournalTest.java
 (original)
+++ 
jackrabbit/oak/branches/1.2/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/AbstractJournalTest.java
 Thu Nov 23 08:25:33 2017
@@ -60,10 +60,6 @@ public abstract class AbstractJournalTes
         mks.clear();
     }
 
-    protected static void invalidateDocChildrenCache(DocumentNodeStore store) {
-        store.invalidateDocChildrenCache();
-    }
-
     protected static void renewClusterIdLease(DocumentNodeStore store) {
         store.renewClusterIdLease();
     }

Copied: 
jackrabbit/oak/branches/1.2/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/ConcurrentReadAndAddTest.java
 (from r1750656, 
jackrabbit/oak/trunk/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/ConcurrentReadAndAddTest.java)
URL: 
http://svn.apache.org/viewvc/jackrabbit/oak/branches/1.2/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/ConcurrentReadAndAddTest.java?p2=jackrabbit/oak/branches/1.2/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/ConcurrentReadAndAddTest.java&p1=jackrabbit/oak/trunk/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/ConcurrentReadAndAddTest.java&r1=1750656&r2=1816107&rev=1816107&view=diff
==============================================================================
--- 
jackrabbit/oak/trunk/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/ConcurrentReadAndAddTest.java
 (original)
+++ 
jackrabbit/oak/branches/1.2/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/ConcurrentReadAndAddTest.java
 Thu Nov 23 08:25:33 2017
@@ -33,13 +33,11 @@ import org.apache.jackrabbit.oak.spi.sta
 import org.apache.jackrabbit.oak.spi.state.NodeBuilder;
 import org.apache.jackrabbit.oak.spi.state.NodeState;
 import org.junit.Before;
-import org.junit.Ignore;
 import org.junit.Rule;
 import org.junit.Test;
 
 import static org.junit.Assert.assertEquals;
 
-@Ignore
 public class ConcurrentReadAndAddTest {
 
     @Rule

Modified: 
jackrabbit/oak/branches/1.2/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/VersionGCDeletionTest.java
URL: 
http://svn.apache.org/viewvc/jackrabbit/oak/branches/1.2/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/VersionGCDeletionTest.java?rev=1816107&r1=1816106&r2=1816107&view=diff
==============================================================================
--- 
jackrabbit/oak/branches/1.2/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/VersionGCDeletionTest.java
 (original)
+++ 
jackrabbit/oak/branches/1.2/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/VersionGCDeletionTest.java
 Thu Nov 23 08:25:33 2017
@@ -215,14 +215,18 @@ public class VersionGCDeletionTest {
         final Semaphore queries = new Semaphore(0);
         final CountDownLatch ready = new CountDownLatch(1);
         MemoryDocumentStore ms = new MemoryDocumentStore() {
+            @Nonnull
             @Override
-            public <T extends Document> T find(Collection<T> collection,
-                                               String key) {
-                if (Thread.currentThread() != currentThread) {
+            public <T extends Document> List<T> query(Collection<T> collection,
+                                                      String fromKey,
+                                                      String toKey,
+                                                      int limit) {
+                if (collection == Collection.NODES
+                        && Thread.currentThread() != currentThread) {
                     ready.countDown();
                     queries.acquireUninterruptibly();
                 }
-                return super.find(collection, key);
+                return super.query(collection, fromKey, toKey, limit);
             }
         };
         store = new DocumentMK.Builder().clock(clock)
@@ -280,7 +284,7 @@ public class VersionGCDeletionTest {
         VersionGCStats stats = gc.gc(30, MINUTES);
         assertEquals(90, stats.deletedDocGCCount);
 
-        queries.release(200);
+        queries.release(2);
 
         List<String> names = f.get();
         assertEquals(expected, names);

Modified: 
jackrabbit/oak/branches/1.2/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/mongo/JournalIT.java
URL: 
http://svn.apache.org/viewvc/jackrabbit/oak/branches/1.2/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/mongo/JournalIT.java?rev=1816107&r1=1816106&r2=1816107&view=diff
==============================================================================
--- 
jackrabbit/oak/branches/1.2/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/mongo/JournalIT.java
 (original)
+++ 
jackrabbit/oak/branches/1.2/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/mongo/JournalIT.java
 Thu Nov 23 08:25:33 2017
@@ -70,8 +70,7 @@ public class JournalIT extends AbstractJ
         final DocumentNodeStore ns2 = createMK(2, 0).getNodeStore();
         LOG.info("cache size 1: 
"+(ns1.getDocumentStore().getCacheStats()==null ? "null" : 
ns1.getDocumentStore().getCacheStats().getElementCount()));
 
-        // invalidate both caches under test first
-        invalidateDocChildrenCache(ns1);
+        // invalidate cache under test first
         ns1.getDocumentStore().invalidateCache();
 
         {
@@ -167,8 +166,7 @@ public class JournalIT extends AbstractJ
         final DocumentNodeStore ns1 = createMK(1, 0).getNodeStore();
         final DocumentNodeStore ns2 = createMK(2, 0).getNodeStore();
 
-        // invalidate both caches under test first
-        invalidateDocChildrenCache(ns1);
+        // invalidate cache under test first
         ns1.getDocumentStore().invalidateCache();
 
         // first create child node in instance 1


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