Index: oak-segment-tar/src/main/java/org/apache/jackrabbit/oak/segment/SegmentCache.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- oak-segment-tar/src/main/java/org/apache/jackrabbit/oak/segment/SegmentCache.java	(date 1476260832000)
+++ oak-segment-tar/src/main/java/org/apache/jackrabbit/oak/segment/SegmentCache.java	(revision )
@@ -29,6 +29,8 @@
 import org.apache.jackrabbit.oak.cache.CacheLIRS;
 import org.apache.jackrabbit.oak.cache.CacheLIRS.EvictionCallback;
 import org.apache.jackrabbit.oak.cache.CacheStats;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * A cache for {@link Segment} instances by their {@link SegmentId}.
@@ -44,6 +46,8 @@
  * which always reports a {@link CacheStats#getMissRate() miss rate} of 1.
  */
 public class SegmentCache {
+    private static final Logger LOG = LoggerFactory.getLogger(SegmentCache.class);
+
     public static final int DEFAULT_SEGMENT_CACHE_MB = 256;
 
     private final Weigher<SegmentId, Segment> weigher = new Weigher<SegmentId, Segment>() {
@@ -89,6 +93,7 @@
     @Nonnull
     public Segment getSegment(@Nonnull SegmentId id, @Nonnull Callable<Segment> loader)
     throws ExecutionException {
+        LOG.info("get segmentId {}", id);
         return cache.get(id, loader);
     }
 
@@ -97,6 +102,7 @@
      * @param segment  the segment to cache
      */
     public void putSegment(@Nonnull Segment segment) {
+        LOG.info("put segmentId {}", segment.getSegmentId());
         cache.put(segment.getSegmentId(), segment);
         segment.getSegmentId().loaded(segment);
     }
@@ -105,6 +111,7 @@
      * Clear all segment from the cache
      */
     public void clear() {
+        LOG.info("clear");
         cache.invalidateAll();
     }
 
Index: oak-run/src/main/resources/logback.xml
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- oak-run/src/main/resources/logback.xml	(date 1476260832000)
+++ oak-run/src/main/resources/logback.xml	(revision )
@@ -24,6 +24,13 @@
     </encoder>
   </appender>
 
+  <appender name="file" class="ch.qos.logback.core.FileAppender">
+    <file>target/cache.log</file>
+    <encoder>
+      <pattern>%date{HH:mm:ss.SSS} %-5level %-40([%thread] %F:%L) %msg%n</pattern>
+    </encoder>
+  </appender>
+
   <!-- Disable warnings caused by JCR-3671 -->
   <logger name="org.apache.jackrabbit.core.config.ConfigurationErrorHandler" level="ERROR"/>
 
@@ -43,8 +50,10 @@
 
   <logger name="org.apache.jackrabbit.oak.plugins.segment.file.tooling.ConsistencyChecker" level="DEBUG"/>
 
+  <logger name="org.apache.jackrabbit.oak.segment.SegmentCache" level="INFO"/>
+
   <root level="warn">
-    <appender-ref ref="STDERR" />
+    <appender-ref ref="file" />
   </root>
 
 </configuration>
Index: oak-parent/pom.xml
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- oak-parent/pom.xml	(date 1476260832000)
+++ oak-parent/pom.xml	(revision )
@@ -74,7 +74,7 @@
    <!-- whether skip the surefire unit testing during the integration testing. 
       Override with -Dsurefire.skip.ut=true when needed -->
     <surefire.skip.ut>false</surefire.skip.ut>
-    <segment.tar.version>0.0.14</segment.tar.version>
+    <segment.tar.version>0.0.15-SNAPSHOT</segment.tar.version>
   </properties>
 
   <issueManagement>