Trying to catch ehcache Element ClassCastException - java

I'm having trouble with ehcache trying to cache a table which is bigger than the storage I set to it. Although the application do not fail (because it end up performing the query in the database and returning the data) my log is getting full of ClassCastException.
I don't want to change the settings because it will happen again, I'd like to catch the ClassCastException but it did not work. (I tried filtering the exception with a seam component and at a specific point where the exception is thown)
Versions are: Seam 2.2.2, Hibernate 3.3.3 and ehCache 1.5
ERROR [user:] [DiskStore.java/get] – com.milestone.model.PersonItemCache:
Could not read disk store element for key com.milestone.model.PersonItem#438480.
Error was net.sf.ehcache.Element cannot be cast to net.sf.ehcache.Element
java.lang.ClassCastException: net.sf.ehcache.Element cannot be cast to net.sf.ehcache.Element
at net.sf.ehcache.store.DiskStore.loadElementFromDiskElement(DiskStore.java:302)
at net.sf.ehcache.store.DiskStore.get(DiskStore.java:257)
at net.sf.ehcache.Cache.searchInDiskStore(Cache.java:1202)
at net.sf.ehcache.Cache.get(Cache.java:803)
at org.hibernate.cache.EhCache.get(EhCache.java:80)
at org.hibernate.cache.ReadWriteCache.put(ReadWriteCache.java:178)
at org.hibernate.cache.impl.bridge.EntityAccessStrategyAdapter.putFromLoad(EntityAccessStrategyAdapter.java:68)
at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:179)
at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:877)
at org.hibernate.loader.Loader.doQuery(Loader.java:752)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259)
at org.hibernate.loader.Loader.loadCollection(Loader.java:2019)
at org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:59)
at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:587)
at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:83)
at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1744)
at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:366)
at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:108)
at org.hibernate.collection.AbstractPersistentCollection.readElementExistence(AbstractPersistentCollection.java:164)
at org.hibernate.collection.PersistentBag.contains(PersistentBag.java:262)
at com.milestone.person.PersonItemController.addAsFans(PersonItemController.java:141)

Your exception is ClassCastException: net.sf.ehcache.Element cannot be cast to net.sf.ehcache.Element This is an indication of a bigger problem. You most probably have 2 ehcace core or related jars in classpath. Catching the exception is not a solution. The exception should not happen in the first place.

Related

Getting version mismatch error while updating into DCTM using java

I am trying to update into DCTM through java code, below is the code snippet
IDfDocument communication = (IDfDocument) getDfSession().getObject(DfId.valueOf(communicationId));
communication.setString(ATTR_STATUS, status);
communication.save();
but I am getting the below error
Caused by: DfException:: THREAD: be.ing.ca.xpression.DCTM001P-1; MSG: [DM_OBJ_MGR_E_VERSION_MISMATCH]error: "save of object
090283e589bf689d of type xx_document failed because of version
mismatch: old version was 4"; ERRORCODE: 100; NEXT: null
I thinki am getting this error because there is another process which is trying to modify the object ,and when more than one process try to modify anyobject DCTM throws this exception,
But after lot of searching i dident found any solution which can solve this error
If anyone knows the solution please reply..
Link that i refer
http://www.javablog.fr/?s=version+mismatch
Try calling a fetch() on the object before doing updates.
communication.fetch()
There are some optional parameters AFAIK, but it's been a while since I've been fiddling with DCTM.
Best of luck!

Issue in addPlugInSingleRowFunction upgrading Esper version from 5.3 to 8.3

In our existing application we are using Esper Version 5.3.
We have added few addPlugInSingleRowFunction() to use it in EPL as below --
final Configuration cepConfiguration = new Configuration();
cepConfiguration.addPlugInSingleRowFunction("toNumber", Double.class.getName(), "parseDouble");
cepConfiguration.addPlugInSingleRowFunction("toBoolean", Boolean.class.getName(), "parseBoolean");
This was working fine in 5.3 version.
Post upgrading to 8.3 above code changed as per Esper documentation --
cepConfiguration.getCompiler().addPlugInSingleRowFunction("toNumber", Double.class.getName(), "parseDouble");
cepConfiguration.getCompiler().addPlugInSingleRowFunction("toBoolean", Boolean.class.getName(), "parseBoolean");
But once the sendEventBean() method is called to send a Event to runtime we are seeing below exception every time.
Surprisingly events are getting matched as per the statements present in runtime even if below exception are coming. Though we are not sure whether some events are not matching or not.
Can someone please help on this?
applog.cls=com.espertech.esper.common.internal.epl.expression.dot.core.ExprDotNodeForgeStaticMethodEval,applog.mthd=staticMethodEvalHandleInvocationException,applog.line=228,applog.msg=Invocation exception when invoking method 'parseDouble' of class 'java.lang.Double' passing parameters [null] for statement 'stmt-0': NullPointerException : null,exc.stack=java.lang.NullPointerException\n\tat sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:1838)\n\tat sun.misc.FloatingDecimal.parseDouble(FloatingDecimal.java:110)\n\tat java.lang.Double.parseDouble(Double.java:538)\n\tat generated.StatementAIFactoryProvider_a4bd241445010f45474e4598e34521ca1b2836db_stmt450.m8(StatementAIFactoryProvider_a4bd241445010f45474e4598e34521ca1b2836db_stmt450.java:161)\n\tat generated.StatementAIFactoryProvider_a4bd241445010f45474e4598e34521ca1b2836db_stmt450$2.get(ANONYMOUS.java:148)\n\tat com.espertech.esper.runtime.internal.filtersvcimpl.FilterParamIndexEquals.matchEvent(FilterParamIndexEquals.java:32)\n\tat com.espertech.esper.runtime.internal.filtersvcimpl.FilterHandleSetNode.matchEvent(FilterHandleSetNode.java:100)\n\tat com.espertech.esper.runtime.internal.filtersvcimpl.EventTypeIndex.matchType(EventTypeIndex.java:178)\n\tat com.espertech.esper.runtime.internal.filtersvcimpl.EventTypeIndex.matchEvent(EventTypeIndex.java:124)\n\tat com.espertech.esper.runtime.internal.filtersvcimpl.FilterServiceBase.retryableMatchEvent(FilterServiceBase.java:179)\n\tat com.espertech.esper.runtime.internal.filtersvcimpl.FilterServiceBase.evaluateInternal(FilterServiceBase.java:96)\n\tat com.espertech.esper.runtime.internal.filtersvcimpl.FilterServiceLockCoarse.evaluate(FilterServiceLockCoarse.java:52)\n\tat com.espertech.esper.runtime.internal.kernel.service.EPEventServiceImpl.processMatches(EPEventServiceImpl.java:610)\n\tat com.espertech.esper.runtime.internal.kernel.service.EPEventServiceImpl.processWrappedEvent(EPEventServiceImpl.java:450)\n\tat com.espertech.esper.runtime.internal.kernel.thread.InboundUnitSendEvent.run(InboundUnitSendEvent.java:43)\n\tat java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)\n\tat java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)\n\tat java.lang.Thread.run(Thread.java:748)
You could turn on compiler logging (config.getCompiler().getLogging().setEnableCode(true);) and make sure you have INFO level logging. You can inspect "StatementAIFactoryProvider_a4bd241445010f45474e4598e34521ca1b2836db_stmt450.m8" at line 161 to see what the problem is. Sounds like a null value gets passed to Double.parseDouble. But since I don't have the complete code its hard to say.

H2 - General error: "java.lang.NullPointerException" [50000-182]

I have a quite big (>2.5 GB) h2 database file. Driver version is 1.4.182. Everything worked fine but recently the DB stop to work with exception:
Błąd ogólny: "java.lang.NullPointerException"
General error: "java.lang.NullPointerException" [50000-182] HY000/50000 (Help)
org.h2.jdbc.JdbcSQLException: Błąd ogólny: "java.lang.NullPointerException"
General error: "java.lang.NullPointerException" [50000-182]
at org.h2.message.DbException.getJdbcSQLException(DbException.java:345)
at org.h2.message.DbException.get(DbException.java:168)
at org.h2.message.DbException.convert(DbException.java:295)
at org.h2.engine.Database.openDatabase(Database.java:297)
at org.h2.engine.Database.<init>(Database.java:260)
at org.h2.engine.Engine.openSession(Engine.java:60)
at org.h2.engine.Engine.openSession(Engine.java:167)
at org.h2.engine.Engine.createSessionAndValidate(Engine.java:145)
at org.h2.engine.Engine.createSession(Engine.java:128)
at org.h2.engine.Engine.createSession(Engine.java:26)
at org.h2.engine.SessionRemote.connectEmbeddedOrServer(SessionRemote.java:347)
at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:108)
at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:92)
at org.h2.Driver.connect(Driver.java:72)
at org.h2.server.web.WebServer.getConnection(WebServer.java:750)
at org.h2.server.web.WebApp.test(WebApp.java:895)
at org.h2.server.web.WebApp.process(WebApp.java:221)
at org.h2.server.web.WebApp.processRequest(WebApp.java:170)
at org.h2.server.web.WebThread.process(WebThread.java:137)
at org.h2.server.web.WebThread.run(WebThread.java:93)
at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.NullPointerException
at org.h2.mvstore.db.ValueDataType.compare(ValueDataType.java:102)
at org.h2.mvstore.MVMap.compare(MVMap.java:741)
at org.h2.mvstore.Page.binarySearch(Page.java:388)
at org.h2.mvstore.MVMap.put(MVMap.java:179)
at org.h2.mvstore.MVMap.put(MVMap.java:133)
at org.h2.mvstore.db.TransactionStore.rollbackTo(TransactionStore.java:491)
at org.h2.mvstore.db.TransactionStore$Transaction.rollback(TransactionStore.java:785)
at org.h2.mvstore.db.MVTableEngine$Store.initTransactions(MVTableEngine.java:223)
at org.h2.engine.Database.open(Database.java:736)
at org.h2.engine.Database.openDatabase(Database.java:266)
... 17 more
The problem occurs in my application and using H2 web frontend.
I have tried solution from similar question but I cannot downgrade H2 to 1.3.x as it cannot read 1.4.x DB files.
My questions are:
How to handle it? Is it to possible to make it work again? I have tried downgrade H2 to 1.4.177 but it didn't help.
Is there any way to at least recover data to other format? I could use other DB (Sqlite, etc.) however I would need a way to get to these data.
EDIT: updated stacktrace
EDIT 2: Result of using Recovery tool:
$ java -cp h2-1.4.182.jar org.h2.tools.Recover
Exception in thread "main" java.lang.IllegalStateException: Unknown tag 50 [1.4.182/6]
at org.h2.mvstore.DataUtils.newIllegalStateException(DataUtils.java:762)
at org.h2.mvstore.type.ObjectDataType.read(ObjectDataType.java:222)
at org.h2.mvstore.db.TransactionStore$ArrayType.read(TransactionStore.java:1792)
at org.h2.mvstore.db.TransactionStore$ArrayType.read(TransactionStore.java:1759)
at org.h2.mvstore.Page.read(Page.java:843)
at org.h2.mvstore.Page.read(Page.java:230)
at org.h2.mvstore.MVStore.readPage(MVStore.java:1813)
at org.h2.mvstore.MVMap.readPage(MVMap.java:769)
at org.h2.mvstore.Page.getChildPage(Page.java:252)
at org.h2.mvstore.MVMap.getFirstLast(MVMap.java:351)
at org.h2.mvstore.MVMap.firstKey(MVMap.java:218)
at org.h2.mvstore.db.TransactionStore.init(TransactionStore.java:169)
at org.h2.mvstore.db.TransactionStore.<init>(TransactionStore.java:117)
at org.h2.mvstore.db.TransactionStore.<init>(TransactionStore.java:81)
at org.h2.tools.Recover.dumpMVStoreFile(Recover.java:593)
at org.h2.tools.Recover.process(Recover.java:331)
at org.h2.tools.Recover.runTool(Recover.java:192)
at org.h2.tools.Recover.main(Recover.java:155)
I also noticed that two another files (.txt and .sql) has been created but they don't seem to contain a data.
I got the same situation last week with JIRA database, it took me few hours to do google regarding to this problem however, there are no answers which can resolve the situation.
I decided to take a look at H2 source code and I can recover the whole database with very simple code. I may not understand whole picture about the situation e.g. root cause, in which condition it happened, etc.
However, the cause is: when you connect to h2 file then H2 engine will look into auditLog and rollback the in-progress transactions, there are some data which have unknown type (id is 17) and H2 fails to rollback due to exception during recognize the type (id 17).
My code is simple, add h2 lib into your build path then just manual connect to file and clear auditLog because I think it is just the log and will not have big impact (someone may correct me).
Hopefully, you can resolve your problem as well.
public static void main(final String[] args) {
// open the store (in-memory if fileName is null)
final MVStore store = MVStore.open("C:\\temp\\h2db.mv.db");
final MVMap<Object, Object> openMap = store.openMap("undoLog");
openMap.clear();
// close the store (this will persist changes)
store.close();
}
Another solution for this problem:
Go to your home folder (~ in linux).
Move all files named [*.mv.db] to a backup with a different name. For example: mv xyz.mv.db xyz.mv.db.backup
Restart your database.
This seems to clear out MVStore meta-data used for H2 undo features, and resolves the NPE from the MV Store compare.
I had a similar problem:
[HY000][50000] Allgemeiner Fehler: "java.lang.NullPointerException"
General error: "java.lang.NullPointerException" [50000-176]
java.lang.NullPointerException
I tried to connect with IntelliJ to H2 file DB. H2 driver version was 1.3.176 but the DB file version had 1.3.161. So downgraded the driver to 1.3.161 in IntelliJ solved the problem completely.

Owl2Java Code generation issue

I'm using the owl2java plugin to generate Java code from an Ontology file. But I'm always getting de same error.
Exception in thread "main" com.hp.hpl.jena.ontology.ConversionException: Cannot convert node http://www.w3.org/2002/07/owl#bottomObjectProperty to TransitiveProperty
at com.hp.hpl.jena.ontology.impl.TransitivePropertyImpl$1.wrap(TransitivePropertyImpl.java:66)
at com.hp.hpl.jena.enhanced.EnhNode.convertTo(EnhNode.java:142)
at com.hp.hpl.jena.enhanced.EnhNode.convertTo(EnhNode.java:22)
at com.hp.hpl.jena.enhanced.Polymorphic.asInternal(Polymorphic.java:54)
at com.hp.hpl.jena.enhanced.EnhNode.viewAs(EnhNode.java:92)
at com.hp.hpl.jena.enhanced.EnhGraph.getNodeAs(EnhGraph.java:135)
at com.hp.hpl.jena.ontology.impl.OntModelImpl$SubjectNodeAs.map1(OntModelImpl.java:3040)
at com.hp.hpl.jena.ontology.impl.OntModelImpl$SubjectNodeAs.map1(OntModelImpl.java:3033)
at com.hp.hpl.jena.util.iterator.Map1Iterator.next(Map1Iterator.java:35)
at com.hp.hpl.jena.util.iterator.WrappedIterator.next(WrappedIterator.java:68)
at com.hp.hpl.jena.util.iterator.UniqueExtendedIterator.nextIfNew(UniqueExtendedIterator.java:61)
at com.hp.hpl.jena.util.iterator.UniqueExtendedIterator.hasNext(UniqueExtendedIterator.java:69)
at com.hp.hpl.jena.util.iterator.NiceIterator.asList(NiceIterator.java:185)
at com.hp.hpl.jena.util.iterator.NiceIterator.toList(NiceIterator.java:159)
at de.incunabulum.owl2java.core.generator.OwlReader.handleProperties(OwlReader.java:862)
at de.incunabulum.owl2java.core.generator.OwlReader.generateJModel(OwlReader.java:457)
at de.incunabulum.owl2java.core.JenaGenerator.generate(JenaGenerator.java:65)
at onto.main.main(main.java:99)
I have no idea about what I'm doing wrong. Any Ideas?
Thanks you a lot.
I looked at the top line on your exception, and see com.hp.hpl.jena.ontology.impl.TransitivePropertyImpl.
Googling for that leads to a version of the source code. It may not be exactly the same version as you're using, but is probably close enough to be informative. Reading the code leads to these questions:
Does your Model have a profile? It must.
Does the profile support Transitivity? It must.
Are you combining Transitive with something else that it's incompatible with?

Why doesn't printStackTrace work in Clojure?

In both the Joy of Clojure and on Alex Miller's Pure Danger Tech blog-post it is recommended that you can print the last stack using something like the following:
(use 'clojure.stacktrace)
(java.util.Date. "foo")
(.printStackTrace *e 5)
But I can't get any of their examples to work, and instead just get
java.lang.NullPointerException: null
Reflector.java:26 clojure.lang.Reflector.invokeInstanceMethod
(Unknown Source) jtown$eval9755.invoke
What's up with this? .printStackTrace seems to be a Java function from the looks of it, so I am not sure why I am bringing clojure.stacktrace into my namespace, in the first place. I read through the clojure.stacktrace API, though, and see an e function, which seems similar too but is not the *e function, which is in core and is supposed to be binding to the last exception, but isn't. Could somebody straighten me out on the best way to check stack-traces?
There are some special vars available when using the REPL and
*e - holds the result of the last exception.
For instance:
core=> (java.util.Date. "foo")
IllegalArgumentException java.util.Date.parse (Date.java:615)
core=> (class *e)
java.lang.IllegalArgumentException
core=> (.printStackTrace *e)
java.lang.IllegalArgumentException
at java.util.Date.parse(Date.java:615)
<not included.....>
You are right, .printStackTrace is the java method that is invoked on the exception class. This is not very straightforward (since its java interop) so clojure.stacktrace namespace has some utilities about working with stack traces
So after
(use 'clojure.stacktrace)
you can use the stacktrace library instead of java interop:
core=> (print-stack-trace *e)
java.lang.IllegalArgumentException: null
at java.util.Date.parse (Date.java:615)
<not included.....>
Obviously in an app, instead of *e, you can do a try - catch and use the related functions as necessary
I use
(.printStackTrace *e *out*)
That seems to work.

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