Hi Folks,
I am doing some crash testing with a single cache node of GemFire, where I
power off the VM where cache is running and then bring it back up. Upon
restart, GemFire refuses to come up with this error:
Caused by: java.lang.NullPointerException
at
com.gemstone.gemfire.internal.util.concurrent.CustomEntryConcurrentHashMap.keyHash(CustomEntryConcurrentHashMap.java:228)
~[gemfire-8.2.0.2.jar:?]
at
com.gemstone.gemfire.internal.cache.AbstractRegionEntry$HashRegionEntryCreator.keyHashCode(AbstractRegionEntry.java:934)
~[gemfire-8.2.0.2.jar:?]
at
com.gemstone.gemfire.internal.util.concurrent.CustomEntryConcurrentHashMap.get(CustomEntryConcurrentHashMap.java:1447)
~[gemfire-8.2.0.2.jar:?]
at
com.gemstone.gemfire.internal.cache.AbstractRegionMap.getEntry(AbstractRegionMap.java:368)
~[gemfire-8.2.0.2.jar:?]
at
com.gemstone.gemfire.internal.cache.AbstractLRURegionMap.getEntry(AbstractLRURegionMap.java:47)
~[gemfire-8.2.0.2.jar:?]
at
com.gemstone.gemfire.internal.cache.PlaceHolderDiskRegion.getDiskEntry(PlaceHolderDiskRegion.java:93)
~[gemfire-8.2.0.2.jar:?]
at
com.gemstone.gemfire.internal.cache.Oplog.readModifyEntry(Oplog.java:2779)
~[gemfire-8.2.0.2.jar:?]
at com.gemstone.gemfire.internal.cache.Oplog.readCrf(Oplog.java:1957)
~[gemfire-8.2.0.2.jar:?]
at
com.gemstone.gemfire.internal.cache.Oplog.recoverCrf(Oplog.java:2270)
~[gemfire-8.2.0.2.jar:?]
at
com.gemstone.gemfire.internal.cache.PersistentOplogSet.recoverOplogs(PersistentOplogSet.java:459)
~[gemfire-8.2.0.2.jar:?]
at
com.gemstone.gemfire.internal.cache.PersistentOplogSet.recoverRegionsThatAreReady(PersistentOplogSet.java:367)
~[gemfire-8.2.0.2.jar:?]
at
com.gemstone.gemfire.internal.cache.DiskStoreImpl.recoverRegionsThatAreReady(DiskStoreImpl.java:2065)
~[gemfire-8.2.0.2.jar:?]
at
com.gemstone.gemfire.internal.cache.DiskStoreImpl.initializeIfNeeded(DiskStoreImpl.java:2052)
~[gemfire-8.2.0.2.jar:?]
at
com.gemstone.gemfire.internal.cache.DiskStoreImpl.doInitialRecovery(DiskStoreImpl.java:2057)
~[gemfire-8.2.0.2.jar:?]
at
com.gemstone.gemfire.internal.cache.DiskStoreFactoryImpl.create(DiskStoreFactoryImpl.java:135)
~[gemfire-8.2.0.2.jar:?]
at
com.gemstone.gemfire.internal.cache.xmlcache.CacheCreation.createDiskStore(CacheCreation.java:650)
~[gemfire-8.2.0.2.jar:?]
at
com.gemstone.gemfire.internal.cache.xmlcache.CacheCreation.create(CacheCreation.java:425)
~[gemfire-8.2.0.2.jar:?]
at
com.gemstone.gemfire.internal.cache.xmlcache.CacheXmlParser.create(CacheXmlParser.java:331)
~[gemfire-8.2.0.2.jar:?]
at
com.gemstone.gemfire.internal.cache.GemFireCacheImpl.loadCacheXml(GemFireCacheImpl.java:4248)
~[gemfire-8.2.0.2.jar:?]
at
org.springframework.data.gemfire.CacheFactoryBean.init(CacheFactoryBean.java:306)
~[spring-data-gemfire-1.5.2.RELEASE.jar:1.5.2.RELEASE]
at
org.springframework.data.gemfire.CacheFactoryBean.getObject(CacheFactoryBean.java:455)
~[spring-data-gemfire-1.5.2.RELEASE.jar:1.5.2.RELEASE]
It hints at GemFire data on disk being corrupted, so I used 'gfsh' to verify:
gfsh>validate offline-disk-store --name=nsxDiskStore
--disk-dirs=/common/nsxapi/data/self
Validating nsxDiskStore
/nsx_sys/ArrayListIDPriorityModel: entryCount=0
/nsx_sys/Crl: entryCount=0
/nsx_sys/Certificate: entryCount=1
......
Error in validating disk store nsxDiskStore is : null
This confirms that the disk-store is corrupted, but doesn't give any more
information to debug this further. How do I go about debugging this? Have you
seen this before and are there any fixes/workarounds available?
Thanks
Kapil
