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RE: Help with XML Beans

by Mohan Thurairajah :: Rate this Message:

Re: Help with XML Beans

is it possible for me to have a separate resource loader for .xsb? it looks like JNLP class loader is not thread safe. It is trying to call "put" on HashMap but hash map is not thread safe. It may cause the CPU to spin. Please advice and it is really appreciated. We are really happy with xml bean performance but this issue is causing lot of noise on our side.

Thanks for your time.

From: Mohan Thurairajah
Sent: Wednesday, June 04, 2008 1:39 AM
To: dev@...
Subject: RE: Help with XML Beans

In this case: two threads are parsing two different byte arrays to generate java objects. yes, xml bean is looking for a .xsb resource but it is spinning. I don't set unsync option, so what is the default behavior?

we use xml beans 2.3.

we don't validate the using xml bean. What we have is server is generating xml using xml beans and send it over http. The client is reading it off the output stream and generate bytes array and try to parse using xml beans.

From: Jacob Danner [mailto:jacob.danner@...]
Sent: Wed 6/4/2008 1:26 AM
To: dev@...
Subject: Re: Help with XML Beans

So your application is "generating xml messages or parsing byte arrays
to generate java objects"? Can you determine which one? From the stack
trace you posted is looked like XMLBeans is trying to resolve
something from the SchemaTypeSystem and the hang is caused by the way
JNLP is getting the resource. Can you confirm? Which resource is it
trying to get?

What is the option you have set for
http://xmlbeans.apache.org/docs/2.0.0/reference/org/apache/xmlbeans/XmlOptions.html#setUnsynchronized()

Which version are you using?

Is it possibly related to:
http://issues.apache.org/jira/browse/XMLBEANS-46
http://issues.apache.org/jira/browse/XMLBEANS-328
http://issues.apache.org/jira/browse/XMLBEANS-345
(it didn't look related, but I thought I'd mention anyways)

-jacobd

On Tue, Jun 3, 2008 at 10:05 PM, Mohan Thurairajah
<Mohan.Thurairajah@...> wrote:

>
> Thanks for the quick reply. cpu is at 100% and we needs to restart the
> application. it is very hard to reproduce at times as well. The swing gui is
> generating xml messages or parsing byte arrays to generate java objects.
> ________________________________
> From: Jacob Danner [jacob.danner@...]
> Sent: Wed 6/4/2008 1:02 AM
> To: dev@...
> Subject: Re: Help with XML Beans
>
> What is happening in your application when this issue occurs?
> -jacobd
>
> On Tue, Jun 3, 2008 at 9:57 PM, Mohan Thurairajah
> <Mohan.Thurairajah@...> wrote:
>> Hi All,
>>
>> We are using XML Beans in a multithreaded environment. We use webstart and
>> xml beans on the client side. It looks like xml beans is having trouble
>> with
>> jnlp class loader and it is causing two or more threads to spin 100% CPU.
>> Could you help plz? we need to go to prod soon but this is causing lots of
>> trouble:
>>
>> "HB-Requestor" daemon prio=6 tid=0x0478cc00 nid=0x1110 runnable
>> [0x0612e000..0x0612fd14]
>>    java.lang.Thread.State: RUNNABLE
>> at java.util.HashMap.put(Unknown Source)
>> at com.sun.deploy.cache.CacheEntry.readManifest(Unknown Source)
>> at com.sun.deploy.cache.CacheEntry.readManifest(Unknown Source)
>> at com.sun.deploy.cache.CacheEntry.access$300(Unknown Source)
>> at com.sun.deploy.cache.CacheEntry$2.run(Unknown Source)
>> at java.security.AccessController.doPrivileged(Native Method)
>> at com.sun.deploy.cache.CacheEntry.getJarFile(Unknown Source)
>> at com.sun.deploy.net.DownloadEngine.getCachedJarFile(Unknown Source)
>> at com.sun.deploy.net.DownloadEngine.getCachedJarFile(Unknown Source)
>> at com.sun.jnlp.JNLPClassLoader$3.run(Unknown Source)
>> at java.security.AccessController.doPrivileged(Native Method)
>> at com.sun.jnlp.JNLPClassLoader.getJarFile(Unknown Source)
>> at com.sun.jnlp.JNLPCachedJarURLConnection.connect(Unknown Source)
>> at com.sun.jnlp.JNLPCachedJarURLConnection.getInputStream(Unknown Source)
>> at java.net.URL.openStream(Unknown Source)
>> at java.lang.ClassLoader.getResourceAsStream(Unknown Source)
>> at
>>
>> org.apache.xmlbeans.impl.schema.SchemaTypeLoaderImpl.crackEntry(SchemaTypeLoaderImpl.java:337)
>> at
>>
>> org.apache.xmlbeans.impl.schema.SchemaTypeLoaderImpl.typeSystemForComponent(SchemaTypeLoaderImpl.java:256)
>> at
>>
>> org.apache.xmlbeans.impl.schema.SchemaTypeLoaderImpl.findDocumentTypeRef(SchemaTypeLoaderImpl.java:430)
>> at
>>
>> org.apache.xmlbeans.impl.schema.SchemaTypeLoaderBase.findDocumentType(SchemaTypeLoaderBase.java:129)
>> at org.apache.xmlbeans.impl.store.Locale.autoTypeDocument(Locale.java:312)
>> at
>> org.apache.xmlbeans.impl.store.Locale.parseToXmlObject(Locale.java:1273)
>> at
>> org.apache.xmlbeans.impl.store.Locale.parseToXmlObject(Locale.java:1257)
>> - locked <0x078a0500> (a org.apache.xmlbeans.impl.store.Locale)
>> at
>>
>> org.apache.xmlbeans.impl.schema.SchemaTypeLoaderBase.parse(SchemaTypeLoaderBase.java:345)
>> at org.fixprotocol.fixml50.FIXMLDocument$Factory.parse(Unknown Source)
>> at
>>
>> com.cpex.ptms.gateway.FixMLGatewayMessageFactory.createGatewayMessage(FixMLGatewayMessageFactory.java:131)
>> at
>>
>> com.cpex.ptms.gateway.transport.AbstractGatewayConnection.receive(AbstractGatewayConnection.java:56)
>> at
>>
>> com.cpex.ptms.gateway.client.ClientGateway.sendAndReceive(ClientGateway.java:314)
>> at
>>
>> com.cpex.ptms.gateway.client.ClientGateway.marshalSendAndReceive(ClientGateway.java:237)
>> at
>>
>> com.cpex.ptms.gateway.client.ClientGateway.marshalSendAndReceive(ClientGateway.java:230)
>> at
>>
>> com.cpex.ptms.gateway.client.ClientGateway.marshalSendAndReceive(ClientGateway.java:220)
>> at
>>
>> com.cpex.ptms.client.gateway.HeartBeatManager$HeartBeatRequestor.run(HeartBeatManager.java:279)
>> at java.lang.Thread.run(Unknown Source)
>>
>> "HB-Monitor" daemon prio=6 tid=0x0478b800 nid=0x12b4 waiting on condition
>> [0x04c3f000..0x04c3fd94]
>>    java.lang.Thread.State: TIMED_WAITING (sleeping)
>> at java.lang.Thread.sleep(Native Method)
>> at
>>
>> com.cpex.ptms.client.gateway.HeartBeatManager$1.run(HeartBeatManager.java:130)
>> at java.lang.Thread.run(Unknown Source)
>>
>> "PTMSStreamer" prio=6 tid=0x031d4400 nid=0x970 runnable
>> [0x033de000..0x033dfa14]
>>    java.lang.Thread.State: RUNNABLE
>> at java.util.HashMap.put(Unknown Source)
>> at com.sun.deploy.cache.CacheEntry.readManifest(Unknown Source)
>> at com.sun.deploy.cache.CacheEntry.readManifest(Unknown Source)
>> at com.sun.deploy.cache.CacheEntry.access$300(Unknown Source)
>> at com.sun.deploy.cache.CacheEntry$2.run(Unknown Source)
>> at java.security.AccessController.doPrivileged(Native Method)
>> at com.sun.deploy.cache.CacheEntry.getJarFile(Unknown Source)
>> at com.sun.deploy.net.DownloadEngine.getCachedJarFile(Unknown Source)
>> at com.sun.deploy.net.DownloadEngine.getCachedJarFile(Unknown Source)
>> at com.sun.jnlp.JNLPClassLoader$3.run(Unknown Source)
>> at java.security.AccessController.doPrivileged(Native Method)
>> at com.sun.jnlp.JNLPClassLoader.getJarFile(Unknown Source)
>> at com.sun.jnlp.JNLPCachedJarURLConnection.connect(Unknown Source)
>> at com.sun.jnlp.JNLPCachedJarURLConnection.getInputStream(Unknown Source)
>> at java.net.URL.openStream(Unknown Source)
>> at java.lang.ClassLoader.getResourceAsStream(Unknown Source)
>> at
>>
>> org.apache.xmlbeans.impl.schema.SchemaTypeLoaderImpl.crackEntry(SchemaTypeLoaderImpl.java:337)
>> at
>>
>> org.apache.xmlbeans.impl.schema.SchemaTypeLoaderImpl.typeSystemForComponent(SchemaTypeLoaderImpl.java:256)
>> at
>>
>> org.apache.xmlbeans.impl.schema.SchemaTypeLoaderImpl.findElementRef(SchemaTypeLoaderImpl.java:480)
>> at
>>
>> org.apache.xmlbeans.impl.schema.SchemaTypeLoaderBase.findElement(SchemaTypeLoaderBase.java:169)
>> at
>>
>> org.apache.xmlbeans.impl.schema.SchemaTypeImpl.createElementType(SchemaTypeImpl.java:970)
>> at
>>
>> org.apache.xmlbeans.impl.values.XmlObjectBase.create_element_user(XmlObjectBase.java:893)
>> at org.apache.xmlbeans.impl.store.Xobj.getUser(Xobj.java:1657)
>> at org.apache.xmlbeans.impl.store.Xobj.find_element_user(Xobj.java:2071)
>> at
>>
>> org.fixprotocol.fixml50.impl.FIXMLDocumentImpl$FIXMLImpl.getMessage(Unknown
>> Source)
>> - locked <0x132f39d8> (a org.apache.xmlbeans.impl.store.Locale)
>> at
>>
>> com.cpex.ptms.gateway.client.ClientGateway.startStreamer(ClientGateway.java:440)
>> at
>>
>> com.cpex.ptms.gateway.client.ClientGateway.startStreamer(ClientGateway.java:383)
>> at
>>
>> com.cpex.ptms.gateway.client.ClientGateway.startStreamer(ClientGateway.java:370)
>> at
>>
>> com.cpex.ptms.client.gateway.FixMLClientGateway.startStreamerConnection(FixMLClientGateway.java:44)
>> at
>>
>> com.cpex.ptms.client.service.PtmsClientServiceImpl.startStreamerConnection(PtmsClientServiceImpl.java:176)
>> at app.Comm.PtmsMsgHandler$3.run(PtmsMsgHandler.java:368)
>> at java.lang.Thread.run(Unknown Source)
>> Thanks,
>> Mohan
>>
>> Mohan Thurairajah - Manager, Development
>> IntercontinentalExchange | ICE
>> 2100 RiverEdge Pkwy | 5th Floor | Atlanta, GA 30328
>> Tel: 770.738.2148 | Fax: 770.951.1307
>> mohan@...
>>
>> 24-hour ice helpdesk 770.738.2101
>> www.theice.com
>>
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>
>
>
> --
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> the fight against cancer!
> Please help support my efforts by going to:
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>
> ________________________________
>
> This message may contain confidential information and is intended for
> specific recipients unless explicitly noted otherwise. If you have reason to
> believe you are not an intended recipient of this message, please delete it
> and notify the sender. This message may not represent the opinion of
> IntercontinentalExchange, Inc. (ICE), its subsidiaries or affiliates, and
> does not constitute a contract or guarantee. Unencrypted electronic mail is
> not secure and the recipient of this message is expected to provide
> safeguards from viruses and pursue alternate means of communication where
> privacy or a binding message is desired.

--
I'm competing in a Half-Ironman distance triathlon to raise money for
the fight against cancer!
Please help support my efforts by going to:
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