EH Cache is throwing NotSerializableException exception

[Anurag Joshi]

1. What version of Ehcache you are currently using;
2. Paste the configuration for the Cache/CacheManager you have an issue with;
3. Add any name and version of other library or framework you use Ehcache with (e.g. Hibernate);
4. Providing JDK and OS versions maybe useful as well.

1. We are using ehcache-core-2.3.2.jar 
2. Paste the configuration for the Cache-;

defaultDisableInvalidation=false

defaultTimeToLiveSeconds=360

defaultMaxElementsInMemory=1000

defaultOverflowToDisk=true

defaultMemoryStoreEvictionPolicy=LRU

defaultMaxElementsOnDisk=100000

defaultDiskPersistent=false

     3. Add any name and version of other library or framework you use Ehcache with (e.g. Hibernate); Oracle ATG Commerce

     4 .Providing JDK and OS versions maybe useful as well - Linux 64 bit and java "1.8.0_91"

We are getting below mention exception while writing objects into disk.

SEVERE [net.sf.ehcache.store.compound.factories.DiskStorageFactory] (SCLStore.data:) [sessionId: BuOnPqsijNilDvpUMW9Udrfm.node18 profileId: 1541050000 ] Disk Write of DTOCacheKeysImpl [mDataMap={recordLimit=0, filterStateHashCode=-1202033242, cartridgeType=Header-TopMenu}] failed (it will be evicted instead): : java.io.NotSerializableException: com.endeca.infront.cartridge.RecordSpotlightSelection

at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1181)

at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:347)

at java.util.HashMap.writeObject(HashMap.java:1133)

at sun.reflect.GeneratedMethodAccessor986.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:606)

at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:988)

at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1493)

at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1429)

at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1175)

at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1541)

at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:439)

at net.sf.ehcache.Element.writeObject(Element.java:787)

at sun.reflect.GeneratedMethodAccessor1069.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:606)

at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:988)

at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1493)

at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1429)

at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1175)

at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:347)

at net.sf.ehcache.util.MemoryEfficientByteArrayOutputStream.serialize(MemoryEfficientByteArrayOutputStream.java:97)

at net.sf.ehcache.store.compound.factories.DiskStorageFactory.serializeElement(DiskStorageFactory.java:327)

at net.sf.ehcache.store.compound.factories.DiskStorageFactory.write(DiskStorageFactory.java:306)

at net.sf.ehcache.store.compound.factories.DiskStorageFactory$DiskWriteTask.call(DiskStorageFactory.java:412)

at net.sf.ehcache.store.compound.factories.DiskOverflowStorageFactory$OverflowDiskWriteTask.call(DiskOverflowStorageFactory.java:247)

at net.sf.ehcache.store.compound.factories.DiskOverflowStorageFactory$OverflowDiskWriteTask.call(DiskOverflowStorageFactory.java:236)

at java.util.concurrent.FutureTask.run(FutureTask.java:262)

at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:178)

at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:292)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)

at java.lang.Thread.run(Thread.java:724)

 

[Louis Jacomet]

Hello,

As the exception indicates, what you put in the cache does not implement Serializable or contains a reference to something that does not.

And as soon as you use the disk store, this becomes a requirement.

Regards,

Louis

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[Anurag Joshi]

Hello,

Thanks for reply.
These are OOB exception we can not make them Serializable.
What should be the solution for that?

Increasing memory and disabling file writing is good idea?

defaultDisableInvalidation=true

defaultTimeToLiveSeconds=1000

defaultMaxElementsInMemory=10000

defaultOverflowToDisk=false

Thanks,
Anurah

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[Fabien Sanglier]

So you are saying you don't control this class 
"com.endeca.infront.cartridge.RecordSpotlightSelection" and cannot make it serializable?

If that's the case, then indeed your option is to not overflow to disk and stay strictly on heap.

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[Alex Snaps]

Another option would be to use Ehcache3.

It supports custom serializers, so these types could be serialized down to disk using some custom serialization mechanisms you would provide: http://www.ehcache.org/documentation/3.0/serializers-copiers.html

Alex

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Alex Snaps

[Alex Snaps]

btw, this could be down to disk, or to offheap with ehcache3... so you'd keep memory-access latency times, without having to grow your heap huge. That being said, if you can afford everything on heap (either it just works, or tune the GC to avoid too long pauses) and by reference, that will obviously get you the best results.

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Alex Snaps

[Swarnakshi Sawant]

hi Fabrien,

i faced same problem, tried setting overflowToDisk=false and overflowToHeap=true. But it seems to be still trying to push it to disk.

Anyother configuration i might need to add?? Please suggest.

CacheManager cacheManager = CacheManager.getInstance();

cacheManager.addCache(cacheTemp);

cacheTemp= cacheManager.getCache("cacheTemp");

cacheTemp.getCacheConfiguration().setEternal(true);

cacheTemp.getCacheConfiguration().setOverflowToDisk(false);

cacheTemp.getCacheConfiguration().setOverflowToOffHeap(true);

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[Fabien Sanglier]

Overflow to offheap also requires serialization.

In ehcache2, not many options outside of implementing Serializable (if not possible, you'd have to set offheap to false and stay strictly on heap)

In ehcache3, like was said in this thread already, you could use custom serializers to serialize your objects (in which case you could leverage overflow to offheap or overflow to disk)

Hope that helps.

Thanks,

Fabien

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