1 Reply Latest reply on May 2, 2011 1:20 PM by dlo1957

ClassNotFoundException in BundleLoader

dlo1957 May 1, 2011 1:40 PM

During normal operation, I am getting the following exception:

Execution of JMS message listener failed, and no ErrorHandler has been set.

org.apache.camel.RuntimeCamelException: net.sf.ehcache.CacheException:

When configured copyOnRead or copyOnWrite, a Store will only accept Serializable values

at org.apache.camel.util.ObjectHelper.wrapRuntimeCamelException(ObjectHelper.java:1139)[68:org.apache.camel.camel-core:2.6.0.fuse-00-00]

...

Caused by: net.sf.ehcache.CacheException: When configured copyOnRead or copyOnWrite, a Store will only accept Serializable values

at net.sf.ehcache.store.compound.ReadWriteSerializationCopyStrategy.copyForRead(ReadWriteSerializationCopyStrategy.java:85)[531:wrap_mvn_net.sf.ehcache_ehcache-core_2.4.2:0]

at net.sf.ehcache.store.compound.ReadWriteSerializationCopyStrategy.copyForRead(ReadWriteSerializationCopyStrategy.java:33)[531:wrap_mvn_net.sf.ehcache_ehcache-core_2.4.2:0]

at net.sf.ehcache.store.compound.Segment.potentiallyCopyForRead(Segment.java:187)[531:wrap_mvn_net.sf.ehcache_ehcache-core_2.4.2:0]

at net.sf.ehcache.store.compound.Segment.decode(Segment.java:179)[531:wrap_mvn_net.sf.ehcache_ehcache-core_2.4.2:0]

at net.sf.ehcache.store.compound.Segment.get(Segment.java:229)[531:wrap_mvn_net.sf.ehcache_ehcache-core_2.4.2:0]

at net.sf.ehcache.store.compound.CompoundStore.get(CompoundStore.java:169)[531:wrap_mvn_net.sf.ehcache_ehcache-core_2.4.2:0]

at net.sf.ehcache.store.compound.CompoundStore.getQuiet(CompoundStore.java:176)[531:wrap_mvn_net.sf.ehcache_ehcache-core_2.4.2:0]

at net.sf.ehcache.Cache.searchInStoreWithoutStats(Cache.java:1925)[531:wrap_mvn_net.sf.ehcache_ehcache-core_2.4.2:0]

at net.sf.ehcache.Cache.get(Cache.java:1547)[531:wrap_mvn_net.sf.ehcache_ehcache-core_2.4.2:0]

at ca.netenergy.dao.cache.ListCacheManager.getList(ListCacheManager.java:42)[534:wrap_mvn_ca.netenergy_ne-dao_1.6:0]

at ca.netenergy.dao.MarketDaoImpl.getMarket(MarketDaoImpl.java:229)[534:wrap_mvn_ca.netenergy_ne-dao_1.6:0]

at ca.ne2.integration.trade.capture.process.NeExchangeEnhancementHelper.lookupMarket(NeExchangeEnhancementHelper.java:200)[528:ne-fix-trade-capture-process:1.0.02.SNAPSHOT]

...

Caused by: java.lang.ClassNotFoundException: ca.netenergy.necommons.domain.Market

at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:506)[osgi-3.6.0.v20100517.jar:]

I have unit tests which uses the MarketDaoImpl and Market classes and does load the ListCacheManager.

These work fine so I'm sure it is not a serialization problem.

Based on the last cause in the stack trace, ca.netenergy.necommons.domain.Market is not being found by the BundleLoader.

The bundles involved here are:

503: wrap_mvn_ca.netenergy_necommons_1.21 (contains Market, the class not found)

531 wrap_mvn_net.sf.ehcache_ehcache-core_2.4.2 (the net.sf.ehcache stuff)

528 FIX Trade Capture Report Process (contains NeExchangeEnhancementHelper and the Camel Route in use during the exception)

534 wrap_mvn_ca.netenergy_ne-dao_1.6 (contains MarketDaoImpl, ListCacheManager)

More possibly useful information:

528 FIX Trade Capture Report Process

imports packages:

ca.netenergy.dao,version=0.0.0 from wrap_mvn_ca.netenergy_ne-dao_1.6 (534)

ca.netenergy.necommons.domain,version=0.0.0 from wrap_mvn_ca.netenergy_necommons_1.21 (503)

ca.netenergy.necommons.messaging,version=0.0.0 from wrap_mvn_ca.netenergy_necommons_1.21 (503)

503: wrap_mvn_ca.netenergy_necommons_1.21

imports bundles:

ne-fix-trade-capture-process (528)

wrap_mvn_ca.netenergy_ne-dao_1.6 (534)

534 wrap_mvn_ca.netenergy_ne-dao_1.6

imports packages:

ca.netenergy.necommons.domain,version=0.0.0 from wrap_mvn_ca.netenergy_necommons_1.21 (503)

ca.netenergy.necommons.event,version=0.0.0 from wrap_mvn_ca.netenergy_necommons_1.21 (503)

ca.netenergy.necommons.fix,version=0.0.0 from wrap_mvn_ca.netenergy_necommons_1.21 (503)

net.sf.ehcache,version=0.0.0 from wrap_mvn_net.sf.ehcache_ehcache-core_2.4.2 (531)

net.sf.ehcache.config,version=0.0.0 from wrap_mvn_net.sf.ehcache_ehcache-core_2.4.2 (531)

net.sf.ehcache.store,version=0.0.0 from wrap_mvn_net.sf.ehcache_ehcache-core_2.4.2 (531)

imports bundles:

ne-fix-trade-capture-process (528)

531 wrap_mvn_net.sf.ehcache_ehcache-core_2.4.2

imports bundles:

wrap_mvn_ca.netenergy_ne-dao_1.6 (534)

Does anyone have any ideas as to why the Market class is not being found? Any ides on how to resolve this issue?

Thanks,

Daryl

1. Re: ClassNotFoundException in BundleLoader

dlo1957 May 2, 2011 1:20 PM (in response to dlo1957)

Looking closer at the stack trace, I figured out the problem and how to solve it.

Basically the problem is:

The call ListCacheManager.getList()

in bundle

calls

Cache.get()

in bundle

which ends up needing to use:

ca.netenergy.necommons.domain.Market

from the bundle:

wrap_mvn_ca.netenergy_necommons_1.21 (503)

The problem is, bundle:

does not import the bundle

wrap_mvn_ca.netenergy_necommons_1.21 (503)

so the BundleLoader cannot find the class.

To resolve this, I needed a Fragment that has:

<Fragment-Host>wrap_mvn_net.sf.ehcache_ehcache-core_2.4.2</Fragment-Host>
<Import-Package>
ca.netenergy.necommons,
ca.netenergy.necommons.domain,
ca.netenergy.necommons.event,
ca.netenergy.necommons.fix,
ca.netenergy.necommons.fix.exception,
ca.netenergy.necommons.messaging
</Import-Package>

Daryl
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