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Posted to dev@jackrabbit.apache.org by "fabrizio giustina (JIRA)" <ji...@apache.org> on 2005/07/05 15:51:11 UTC
[jira] Created: (JCR-161) NPE in CachingHierarchyManager (missing synchronization in LRUEntry.remove)
NPE in CachingHierarchyManager (missing synchronization in LRUEntry.remove)
---------------------------------------------------------------------------
Key: JCR-161
URL: http://issues.apache.org/jira/browse/JCR-161
Project: Jackrabbit
Type: Bug
Reporter: fabrizio giustina
Priority: Minor
stacktrace from jackrabbit rev. 191499 http://svn.apache.org/viewcvs.cgi?rev=191499&view=rev
java.lang.NullPointerException
at org.apache.jackrabbit.core.CachingHierarchyManager$LRUEntry.remove(CachingHierarchyManager.java:638)
at org.apache.jackrabbit.core.CachingHierarchyManager$LRUEntry.touch(CachingHierarchyManager.java:657)
at org.apache.jackrabbit.core.CachingHierarchyManager.resolvePath(CachingHierarchyManager.java:180)
at org.apache.jackrabbit.core.ItemManager.getItem(ItemManager.java:341)
at org.apache.jackrabbit.core.ItemImpl.getAncestor(ItemImpl.java:1469)
I found this error at least a couple of times in my logs, probably due to a missing synchronization in the LRUEntry.remove method.
Line 638 of cachingManager rev 191499:
public void remove() {
if (previous != null) {
previous.next = next; // ----> NPE here
}
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[jira] Assigned: (JCR-161) NPE in CachingHierarchyManager (missing synchronization in LRUEntry.remove)
Posted by "Stefan Guggisberg (JIRA)" <ji...@apache.org>.
[ http://issues.apache.org/jira/browse/JCR-161?page=all ]
Stefan Guggisberg reassigned JCR-161:
-------------------------------------
Assign To: Dominique Pfister
> NPE in CachingHierarchyManager (missing synchronization in LRUEntry.remove)
> ---------------------------------------------------------------------------
>
> Key: JCR-161
> URL: http://issues.apache.org/jira/browse/JCR-161
> Project: Jackrabbit
> Type: Bug
> Reporter: fabrizio giustina
> Assignee: Dominique Pfister
> Priority: Minor
> Fix For: 1.0
>
> stacktrace from jackrabbit rev. 191499 http://svn.apache.org/viewcvs.cgi?rev=191499&view=rev
> java.lang.NullPointerException
> at org.apache.jackrabbit.core.CachingHierarchyManager$LRUEntry.remove(CachingHierarchyManager.java:638)
> at org.apache.jackrabbit.core.CachingHierarchyManager$LRUEntry.touch(CachingHierarchyManager.java:657)
> at org.apache.jackrabbit.core.CachingHierarchyManager.resolvePath(CachingHierarchyManager.java:180)
> at org.apache.jackrabbit.core.ItemManager.getItem(ItemManager.java:341)
> at org.apache.jackrabbit.core.ItemImpl.getAncestor(ItemImpl.java:1469)
> I found this error at least a couple of times in my logs, probably due to a missing synchronization in the LRUEntry.remove method.
> Line 638 of cachingManager rev 191499:
> public void remove() {
> if (previous != null) {
> previous.next = next; // ----> NPE here
> }
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[jira] Closed: (JCR-161) NPE in CachingHierarchyManager (missing synchronization in LRUEntry.remove)
Posted by "Stefan Guggisberg (JIRA)" <ji...@apache.org>.
[ http://issues.apache.org/jira/browse/JCR-161?page=all ]
Stefan Guggisberg closed JCR-161:
---------------------------------
Resolution: Invalid
there's one CachingHierarchyManager instance per Session and since
Session is not thread safe by design CachingHierarchyManager doesn't
need to be thread safe either.
i've never seen NPE thrown by CachingHierarchyManager, even under load
(100 concurrent writing sessions). i guess that the NPE is caused by
incorrect use of Session, probably by sharing a session or a session-bound
item or workspace among multiple threads.
> NPE in CachingHierarchyManager (missing synchronization in LRUEntry.remove)
> ---------------------------------------------------------------------------
>
> Key: JCR-161
> URL: http://issues.apache.org/jira/browse/JCR-161
> Project: Jackrabbit
> Type: Bug
> Reporter: fabrizio giustina
> Assignee: Dominique Pfister
> Priority: Minor
> Fix For: 1.0
>
> stacktrace from jackrabbit rev. 191499 http://svn.apache.org/viewcvs.cgi?rev=191499&view=rev
> java.lang.NullPointerException
> at org.apache.jackrabbit.core.CachingHierarchyManager$LRUEntry.remove(CachingHierarchyManager.java:638)
> at org.apache.jackrabbit.core.CachingHierarchyManager$LRUEntry.touch(CachingHierarchyManager.java:657)
> at org.apache.jackrabbit.core.CachingHierarchyManager.resolvePath(CachingHierarchyManager.java:180)
> at org.apache.jackrabbit.core.ItemManager.getItem(ItemManager.java:341)
> at org.apache.jackrabbit.core.ItemImpl.getAncestor(ItemImpl.java:1469)
> I found this error at least a couple of times in my logs, probably due to a missing synchronization in the LRUEntry.remove method.
> Line 638 of cachingManager rev 191499:
> public void remove() {
> if (previous != null) {
> previous.next = next; // ----> NPE here
> }
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[jira] Updated: (JCR-161) NPE in CachingHierarchyManager (missing synchronization in LRUEntry.remove)
Posted by "Stefan Guggisberg (JIRA)" <ji...@apache.org>.
[ http://issues.apache.org/jira/browse/JCR-161?page=all ]
Stefan Guggisberg updated JCR-161:
----------------------------------
Fix Version: 1.0
> NPE in CachingHierarchyManager (missing synchronization in LRUEntry.remove)
> ---------------------------------------------------------------------------
>
> Key: JCR-161
> URL: http://issues.apache.org/jira/browse/JCR-161
> Project: Jackrabbit
> Type: Bug
> Reporter: fabrizio giustina
> Assignee: Dominique Pfister
> Priority: Minor
> Fix For: 1.0
>
> stacktrace from jackrabbit rev. 191499 http://svn.apache.org/viewcvs.cgi?rev=191499&view=rev
> java.lang.NullPointerException
> at org.apache.jackrabbit.core.CachingHierarchyManager$LRUEntry.remove(CachingHierarchyManager.java:638)
> at org.apache.jackrabbit.core.CachingHierarchyManager$LRUEntry.touch(CachingHierarchyManager.java:657)
> at org.apache.jackrabbit.core.CachingHierarchyManager.resolvePath(CachingHierarchyManager.java:180)
> at org.apache.jackrabbit.core.ItemManager.getItem(ItemManager.java:341)
> at org.apache.jackrabbit.core.ItemImpl.getAncestor(ItemImpl.java:1469)
> I found this error at least a couple of times in my logs, probably due to a missing synchronization in the LRUEntry.remove method.
> Line 638 of cachingManager rev 191499:
> public void remove() {
> if (previous != null) {
> previous.next = next; // ----> NPE here
> }
--
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