One thing that I see in the logs looks to me like a NullPointerException on
attempting to commit an optimistic/serializable transaction.
My reading of this excpetion is that an optimistic lock conflict is
correctly detected in prepare0 but that eventually the code incorrectly
attempts to return this.ret which is null rather than an
IgniteTxOptimisticCheckedException...:
Oct 25 19:25:46 srvr.company apache-ignite[45092]: [19:25:46] (err) Failed
to execute compound future reducer: GridDhtTxPrepareFuture
[futId=2a3ec065f51-75e18206-0fee-4926-99be-bb6fee7b5828, err=null,
replied=1, mapped=1, reads=[], writes=[IgniteTxEntry [key=KeyCacheObjectImpl
[part=115, val=115, hasValBytes=true], cacheId=-211228266, txKey=IgniteTxKey
[key=KeyCacheObjectImpl [part=115, val=115, hasValBytes=true],
cacheId=-211228266], val=[op=UPDATE,
val=com.company.dna.scan.fragment.node.domain.Scan [idHash=1148364470,
hash=525731140, _fragmentIds=HashSet {}, _scannerGroupId=16,
_visibility=EXTERNAL, _scanUUID=d1a7a992-6ff2-4eb0-8398-06e45b15d08b,
_customerId=6779780, _customerMaxReached=false, _priority=1,
_scanStartedMsgSent=false, _empty=true, _idx=115, _canceled=true,
_scanId=45534, _version=2]], prevVal=[op=NOOP, val=null], oldVal=[op=NOOP,
val=null], entryProcessorsCol=null, ttl=-1, conflictExpireTime=-1,
conflictVer=null, explicitVer=null, dhtVer=null, filters=[],
filtersPassed=false, filtersSet=false, entry=GridDhtCacheEntry [rdrs=[],
part=115, super=GridDistributedCacheEntry [super=GridCacheMapEntry
[key=KeyCacheObjectImpl [part=115, val=115, hasValBytes=true],
val=com.company.dna.scan.fragment.node.domain.Scan [idHash=582900940,
hash=-1150571357, _fragmentIds=HashSet {}, _scannerGroupId=16,
_visibility=EXTERNAL, _scanUUID=d1a7a992-6ff2-4eb0-8398-06e45b15d08b,
_customerId=6779780, _customerMaxReached=false, _priority=1,
_scanStartedMsgSent=true, _empty=true, _idx=115, _canceled=false,
_scanId=45534, _version=3], startVer=1508977480914, ver=GridCacheVersion
[topVer=120361566, order=1508977480909, nodeOrder=33], hash=115,
extras=GridCacheMvccEntryExtras [mvcc=GridCacheMvcc
[locs=[GridCacheMvccCandidate [nodeId=47680ca3-827f-4788-af9e-d73dd7b030e0,
ver=GridCacheVersion [topVer=120361566, order=1508977480913, nodeOrder=33],
threadId=111, id=396, topVer=AffinityTopologyVersion [topVer=39,
minorTopVer=0], reentry=null,
otherNodeId=7a2804c4-5fae-4258-b6e2-96e75a219ea7, otherVer=GridCacheVersion
[topVer=120361566, order=1508977480890, nodeOrder=39], mappedD
Oct 25 19:25:46 srvr.company apache-ignite[45092]: htNodes=null,
mappedNearNodes=null, ownerVer=null, serOrder=GridCacheVersion
[topVer=120361566, order=1508977480890, nodeOrder=39],
key=KeyCacheObjectImpl [part=115, val=115, hasValBytes=true],
masks=local=1|owner=1|ready=1|reentry=0|used=0|tx=1|single_implicit=0|dht_local=1|near_local=0|removed=0|read=0,
prevVer=null, nextVer=null]], rmts=null]], flags=2]]], prepared=1,
locked=false, nodeId=null, locMapped=false, expiryPlc=null,
transferExpiryPlc=false, flags=0, partUpdateCntr=0,
serReadVer=GridCacheVersion [topVer=120361566, order=1508977480161,
nodeOrder=33], xidVer=null]], trackable=true, nearMiniId=2, last=true,
retVal=false, ret=null, lockKeys=[], forceKeysFut=null, locksReady=true,
invoke=false, timeoutObj=PrepareTimeoutObject [timeout=9976],
xid=GridCacheVersion [topVer=120361566, order=1508977480913, nodeOrder=33],
innerFuts=[], super=GridCompoundFuture
[rdc=o.a.i.i.processors.cache.distributed.dht.GridDhtTxPrepareFuture$1@38648d98,
initFlag=1, lsnrCalls=0, done=false, cancelled=false, err=null,
futs=[]]]java.lang.NullPointerException
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
org.apache.ignite.internal.processors.cache.transactions.IgniteTxLocalAdapter.implicitSingleResult(IgniteTxLocalAdapter.java:352)
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
org.apache.ignite.internal.processors.cache.distributed.dht.GridDhtTxPrepareFuture.createPrepareResponse(GridDhtTxPrepareFuture.java:875)
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
org.apache.ignite.internal.processors.cache.distributed.dht.GridDhtTxPrepareFuture.onDone(GridDhtTxPrepareFuture.java:763)
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
org.apache.ignite.internal.processors.cache.distributed.dht.GridDhtTxPrepareFuture.onDone(GridDhtTxPrepareFuture.java:103)
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
org.apache.ignite.internal.util.future.GridFutureAdapter.onDone(GridFutureAdapter.java:450)
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
org.apache.ignite.internal.util.future.GridCompoundFuture.checkComplete(GridCompoundFuture.java:278)
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
org.apache.ignite.internal.util.future.GridCompoundFuture.markInitialized(GridCompoundFuture.java:269)
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
org.apache.ignite.internal.processors.cache.distributed.dht.GridDhtTxPrepareFuture.prepare0(GridDhtTxPrepareFuture.java:1468)
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
org.apache.ignite.internal.processors.cache.distributed.dht.GridDhtTxPrepareFuture.mapIfLocked(GridDhtTxPrepareFuture.java:668)
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
org.apache.ignite.internal.processors.cache.distributed.dht.GridDhtTxPrepareFuture.prepare(GridDhtTxPrepareFuture.java:1034)
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
org.apache.ignite.internal.processors.cache.distributed.dht.GridDhtTxLocal.prepareAsync(GridDhtTxLocal.java:410)
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
org.apache.ignite.internal.processors.cache.transactions.IgniteTxHandler.prepareNearTx(IgniteTxHandler.java:459)
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
org.apache.ignite.internal.processors.cache.transactions.IgniteTxHandler.processNearTxPrepareRequest(IgniteTxHandler.java:121)
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
org.apache.ignite.internal.processors.cache.transactions.IgniteTxHandler.access$000(IgniteTxHandler.java:95)
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
org.apache.ignite.internal.processors.cache.transactions.IgniteTxHandler$1.apply(IgniteTxHandler.java:141)
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
org.apache.ignite.internal.processors.cache.transactions.IgniteTxHandler$1.apply(IgniteTxHandler.java:139)
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
org.apache.ignite.internal.processors.cache.GridCacheIoManager.processMessage(GridCacheIoManager.java:1042)
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
org.apache.ignite.internal.processors.cache.GridCacheIoManager.onMessage0(GridCacheIoManager.java:561)
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
org.apache.ignite.internal.processors.cache.GridCacheIoManager.handleMessage(GridCacheIoManager.java:378)
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
org.apache.ignite.internal.processors.cache.GridCacheIoManager.handleMessage(GridCacheIoManager.java:304)
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
org.apache.ignite.internal.processors.cache.GridCacheIoManager.access$100(GridCacheIoManager.java:99)
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
org.apache.ignite.internal.processors.cache.GridCacheIoManager$1.onMessage(GridCacheIoManager.java:293)
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
org.apache.ignite.internal.managers.communication.GridIoManager.invokeListener(GridIoManager.java:1556)
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
org.apache.ignite.internal.managers.communication.GridIoManager.processRegularMessage0(GridIoManager.java:1184)
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
org.apache.ignite.internal.managers.communication.GridIoManager.access$4200(GridIoManager.java:126)
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
org.apache.ignite.internal.managers.communication.GridIoManager$9.run(GridIoManager.java:1097)
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
org.apache.ignite.internal.util.StripedExecutor$Stripe.run(StripedExecutor.java:483)
Oct 25 19:25:46 srvr.company apache-ignite[45092]: at
java.lang.Thread.run(Unknown Source)
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