Hi Mohammed,
I'm not an expert on JCS but this might be a problem with your hashCode
method in the ListObject class. Is it possible that one of the fields
your hashCode method uses to generate a hash code might be null?
Niall
On Tue, 2007-09-18 at 02:53 -0700, TMUser wrote:
> Hello,
> I have a little problem with JCS. In the loading of my application, I load
> thousands of objects from a database. If I use just LRUMemory, all my
> objects are loaded and can be read. But if I use LRU and IndexedDiskCache I
> have this error message :
> -----------------------------------------------------
> IndexedDiskCache.java:593 - Region [adosCache] Exception, Problem reading
> object from file
> java.lang.NullPointerException
> at com.test.app.dto.ListObject.hashCode(ListObject.java:130)
> at java.util.HashMap.put(Unknown Source)
> at java.util.HashSet.readObject(Unknown Source)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
> …
> -----------------------------------------------------
> IndexedDiskCache.java:551 - Region [adosCache] Failure getting from disk,
> key = [GAN: groupId=[groupId=adosCache, adosCache], attrName=AZ.BVG.1278]
> java.io.IOException: Region [adosCache] Problem reading object from disk.
> null
> at
> org.apache.jcs.auxiliary.disk.indexed.IndexedDiskCache.readElement(IndexedDiskCache.java:594)
>
> at
> org.apache.jcs.auxiliary.disk.indexed.IndexedDiskCache.doGet(IndexedDiskCache.java:537)
>
> …
> -----------------------------------------------------
>
> When I see in the log, I found that the object witch I tried to read is in
> the cache. Here is a part of my log file:
> -----------------------------------------------------
> 2007-09-17 13:13:40,437 DEBUG [Analyser_0] - LRUMap.java:192 - getting item
> for key [AWS: groupId=[groupId=adosCache, adosCache], attrName=aa.MM.12149]
> 2007-09-17 13:13:40,437 DEBUG [Analyser_0] - LRUMap.java:212 - LRUMap miss
> for [AWS: groupId=[groupId=adosCache, adosCache], attrName=aa.MM.12149]
> 2007-09-17 13:13:40,437 DEBUG [Analyser_0] - IndexedDiskCache.java:528 -
> Region [adosCache] Trying to get from disk: [AWS:
> groupId=[groupId=adosCache, adosCache], attrName=aa.MM.12149]
> 2007-09-17 13:13:40,593 DEBUG [Analyser_0] - LRUMap.java:192 - getting item
> for key [AWS: groupId=[groupId=adosCache, adosCache], attrName=aa.MM.12149]
> 2007-09-17 13:13:40,593 DEBUG [Analyser_0] - LRUMap.java:202 - LRUMap hit
> for [AWS: groupId=[groupId=adosCache, adosCache], attrName=aa.MM.12149]
> 2007-09-17 13:13:40,593 DEBUG [Analyser_0] - IndexedDiskCache.java:580 -
> Region [adosCache] Found on disk, key: [AWS: groupId=[groupId=adosCache,
> adosCache], attrName=aa.MM.12149]
> 2007-09-17 13:13:40,906 ERROR [Analyser_0] - IndexedDiskCache.java:551 -
> Region [adosCache] Failure getting from disk, key = [AWS:
> groupId=[groupId=adosCache, adosCache], attrName=aa.MM.12149]
> -----------------------------------------------------
>
> Please help if a have any idea for resolving this problem.
>
> Thanks in advance.
> Mohammed.
>
____________________________________
Niall Gallagher
Technical Architect
Switchfire Ltd.
phone:
+ 44 (0)20 7798 2807
fax:
+ 44 (0)20 7798 2801
email:
[EMAIL PROTECTED]
web:
www.switchfire.com
