January 2015 - infinispan-issues - Jboss List Archives

[JBoss JIRA] (ISPN-3159) Implementing SERIALIZABLE isolation level based on GMU

by William Burns (JIRA)

[ https://issues.jboss.org/browse/ISPN-3159?page=com.atlassian.jira.plugin.... ] William Burns updated ISPN-3159: -------------------------------- Fix Version/s: 7.2.0.Alpha1 (was: 7.1.0.Final) > Implementing SERIALIZABLE isolation level based on GMU > ------------------------------------------------------ > > Key: ISPN-3159 > URL: https://issues.jboss.org/browse/ISPN-3159 > Project: Infinispan > Issue Type: Feature Request > Components: Transactions > Reporter: Pedro Ruivo > Assignee: Pedro Ruivo > Fix For: 7.2.0.Alpha1 > > > Implementation based in GMU, a Cloud-TM project research (www.cloudtm.eu). > GMU is a muti-version scheme that provides Update Serializability. It allows the read-only transaction to proceed without blocking, but they can observe an old value (but always a consistent value). > This scheme relies in Vector Clock to manage the snapshots to read and the transaction dependencies in each node in the cluster. > Also, it is a genuine scheme, i.e., only the nodes involved in the transaction (that contains data read or write) are involved in the transaction commit. > A paper describing GMU can be found here: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?reload=true&arnumber=62... -- This message was sent by Atlassian JIRA (v6.3.11#6341)

9 years, 11 months

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[JBoss JIRA] (ISPN-3938) AdvancedAsyncCacheLoader.process() concurrency issues

by William Burns (JIRA)

[ https://issues.jboss.org/browse/ISPN-3938?page=com.atlassian.jira.plugin.... ] William Burns updated ISPN-3938: -------------------------------- Fix Version/s: 7.2.0.Alpha1 (was: 7.1.0.Final) > AdvancedAsyncCacheLoader.process() concurrency issues > ----------------------------------------------------- > > Key: ISPN-3938 > URL: https://issues.jboss.org/browse/ISPN-3938 > Project: Infinispan > Issue Type: Bug > Components: Core, Loaders and Stores > Affects Versions: 6.0.0.Final > Reporter: Dan Berindei > Assignee: William Burns > Fix For: 7.2.0.Alpha1 > > > {{AdvancedAsyncCacheLoader.process()}} calls {{advancedLoader().process()}} to collect all the keys in the store, but the HashSet used to collect the keys it not thread-safe. This can cause problems, e.g. during state transfer: > {noformat} > WARN cheTopologyControlCommand | ISPN000071: Caught exception when handling command CacheTopologyControlCommand{cache=sessions, type=CH_UPDATE, sender=alfie-lt-46127, joinInfo=null, topologyId=3, currentCH=DefaultConsistentHash{numSegments=60, numOwners=1, members=[alfie-lt-46127]}, pendingCH=null, throwable=null, viewId=1}java.util.ConcurrentModificationException > at java.util.HashMap$HashIterator.nextEntry(HashMap.java:926) > at java.util.HashMap$KeyIterator.next(HashMap.java:960) > at org.infinispan.persistence.async.AdvancedAsyncCacheLoader.process(AdvancedAsyncCacheLoader.java:80) > at org.infinispan.persistence.manager.PersistenceManagerImpl.processOnAllStores(PersistenceManagerImpl.java:414) > at org.infinispan.statetransfer.StateConsumerImpl.invalidateSegments(StateConsumerImpl.java:910) > at org.infinispan.statetransfer.StateConsumerImpl.onTopologyUpdate(StateConsumerImpl.java:393) > at org.infinispan.statetransfer.StateTransferManagerImpl.doTopologyUpdate(StateTransferManagerImpl.java:178) > at org.infinispan.statetransfer.StateTransferManagerImpl.access$000(StateTransferManagerImpl.java:38) > at org.infinispan.statetransfer.StateTransferManagerImpl$1.updateConsistentHash(StateTransferManagerImpl.java:100) > at org.infinispan.topology.LocalTopologyManagerImpl.handleConsistentHashUpdate(LocalTopologyManagerImpl.java:191) > at org.infinispan.topology.CacheTopologyControlCommand.doPerform(CacheTopologyControlCommand.java:152) > at org.infinispan.topology.CacheTopologyControlCommand.perform(CacheTopologyControlCommand.java:124) > at org.infinispan.topology.ClusterTopologyManagerImpl$3.run(ClusterTopologyManagerImpl.java:606) > at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) > at java.util.concurrent.FutureTask.run(FutureTask.java:262) > 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:744) > {noformat} -- This message was sent by Atlassian JIRA (v6.3.11#6341)

9 years, 11 months

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[JBoss JIRA] (ISPN-3985) In BCHM traverse internal segments for parallel map/reduce execution

by William Burns (JIRA)

[ https://issues.jboss.org/browse/ISPN-3985?page=com.atlassian.jira.plugin.... ] William Burns updated ISPN-3985: -------------------------------- Fix Version/s: 7.2.0.Alpha1 (was: 7.1.0.Final) > In BCHM traverse internal segments for parallel map/reduce execution > -------------------------------------------------------------------- > > Key: ISPN-3985 > URL: https://issues.jboss.org/browse/ISPN-3985 > Project: Infinispan > Issue Type: Enhancement > Components: Core > Affects Versions: 7.0.0.Final > Reporter: Vladimir Blagojevic > Fix For: 7.2.0.Alpha1 > > > Currently when BoundedConcurrentHashMap is used in DataContainer we split input keys and traverse key/value pairs in parallel using executor. That is all good, however, we should optimize this solution as each segment in BCHM is a separate map we can iterate over each segment in a separate thread rather than blindly splitting input keys. -- This message was sent by Atlassian JIRA (v6.3.11#6341)

9 years, 11 months

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[JBoss JIRA] (ISPN-3918) Inconsistent view of the cache with putIfAbsent in a non-tx cache during state transfer

by William Burns (JIRA)

[ https://issues.jboss.org/browse/ISPN-3918?page=com.atlassian.jira.plugin.... ] William Burns updated ISPN-3918: -------------------------------- Fix Version/s: 7.2.0.Alpha1 (was: 7.1.0.Final) > Inconsistent view of the cache with putIfAbsent in a non-tx cache during state transfer > --------------------------------------------------------------------------------------- > > Key: ISPN-3918 > URL: https://issues.jboss.org/browse/ISPN-3918 > Project: Infinispan > Issue Type: Bug > Components: Core, State Transfer > Affects Versions: 6.0.0.Final > Reporter: Dan Berindei > Fix For: 7.2.0.Alpha1 > > Attachments: ntpiadjst.log.gz > > > In a non-tx cache, sometimes it's possible for a {{get(k)}} to return {{null}} even though a previous {{putIfAbsent(k, v)}} returned a non-null value and the only concurrent operations on the cache are concurrent putIfAbsent calls. > Say \[B, A, C] are the owners of k (C just joined) > 1. A starts a {{putIfAbsent(k, v1)}} command, sends it to B > 2. B forwards the command to A and C > 3. C writes {{k=v1}} > 4. C becomes the primary owner of k (owners are now \[C, A]) > 5. A/B see the new topology before committing and throw an outdatedTopologyException > 6. A retries the command, sends it to C > 7. C forwards the command to A, which writes {{k=v1}} > 8. C doesn't have to update the entry, returns null > If, between steps 3 and 7, another thread on A starts a {{putIfAbsent(k, v2)}} command, the command will fail and return {{v1}} (because the primary owner already has a value). However, a subsequent {{get(k)}} command will return {{null}}, because A is an owner and doesn't have the value. -- This message was sent by Atlassian JIRA (v6.3.11#6341)

9 years, 11 months

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[JBoss JIRA] (ISPN-3906) Do not place ProtobufValueWrapper instances in the cache

by William Burns (JIRA)

[ https://issues.jboss.org/browse/ISPN-3906?page=com.atlassian.jira.plugin.... ] William Burns updated ISPN-3906: -------------------------------- Fix Version/s: 7.2.0.Alpha1 (was: 7.1.0.Final) > Do not place ProtobufValueWrapper instances in the cache > -------------------------------------------------------- > > Key: ISPN-3906 > URL: https://issues.jboss.org/browse/ISPN-3906 > Project: Infinispan > Issue Type: Task > Components: Embedded Querying > Affects Versions: 6.0.0.Final > Reporter: Adrian Nistor > Assignee: Adrian Nistor > Fix For: 7.2.0.Alpha1 > > > ProtobufValueWrapper is only needed in order to provide a classbridge so we can integrate with Hibernate Search. Still, we should not need to wrap the protobuf encoded byte array put in the cache with this class. It should only be created as a temporary wrapper just before we feed the data to Hibernate Search. -- This message was sent by Atlassian JIRA (v6.3.11#6341)

9 years, 11 months

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[JBoss JIRA] (ISPN-3905) Murmurhash3 implementation is slow on String keys

by William Burns (JIRA)

[ https://issues.jboss.org/browse/ISPN-3905?page=com.atlassian.jira.plugin.... ] William Burns updated ISPN-3905: -------------------------------- Fix Version/s: 7.2.0.Alpha1 (was: 7.1.0.Final) > Murmurhash3 implementation is slow on String keys > ------------------------------------------------- > > Key: ISPN-3905 > URL: https://issues.jboss.org/browse/ISPN-3905 > Project: Infinispan > Issue Type: Enhancement > Components: Core > Affects Versions: 6.0.0.Final, 6.0.1.Final > Reporter: Sanne Grinovero > Assignee: Dan Berindei > Priority: Minor > Fix For: 7.2.0.Alpha1 > > > String instances are a common choice for being used as key entries, still the getBytes() operation being performed allocates costly buffers, and the computation to get those bytes looks like expensive too. > I suspect there might be good reasons for not using the String's own hashcode directly as an input to Murmurhash? Still that's what other implementations seem to do. -- This message was sent by Atlassian JIRA (v6.3.11#6341)

9 years, 11 months

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[JBoss JIRA] (ISPN-3891) Tune for batching without transactions

by William Burns (JIRA)

[ https://issues.jboss.org/browse/ISPN-3891?page=com.atlassian.jira.plugin.... ] William Burns updated ISPN-3891: -------------------------------- Fix Version/s: 7.2.0.Alpha1 (was: 7.1.0.Final) > Tune for batching without transactions > -------------------------------------- > > Key: ISPN-3891 > URL: https://issues.jboss.org/browse/ISPN-3891 > Project: Infinispan > Issue Type: Enhancement > Components: Transactions > Reporter: Sanne Grinovero > Fix For: 7.2.0.Alpha1 > > > The usage of batching is a critically important feature, widely used to improve performance in many common scenarios, but while documentation makes it clear that it's built on transactions, it's unclear how these transactions should be configured. > Also, I would challenge the decision of building batching on top of transactions and see if there are opportunities for further optimization. -- This message was sent by Atlassian JIRA (v6.3.11#6341)

9 years, 11 months

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[JBoss JIRA] (ISPN-4340) Automatically setup shared indexes when indexing is enabled

by William Burns (JIRA)

[ https://issues.jboss.org/browse/ISPN-4340?page=com.atlassian.jira.plugin.... ] William Burns updated ISPN-4340: -------------------------------- Fix Version/s: 7.2.0.Alpha1 (was: 7.1.0.Final) > Automatically setup shared indexes when indexing is enabled > ----------------------------------------------------------- > > Key: ISPN-4340 > URL: https://issues.jboss.org/browse/ISPN-4340 > Project: Infinispan > Issue Type: Feature Request > Components: Embedded Querying > Reporter: Sanne Grinovero > Assignee: Gustavo Fernandes > Labels: 64QueryBlockers > Fix For: 7.2.0.Alpha1 > > > - on replicated Caches, we should create a default index on a FSDirectory and provide some appropriate default tuning, for example enabling NRT. > - distributed Caches will need the Infinispan Directory (shared) and a master/slave backend (Infinispan IndexManager, while NRT is not compatible in this case) > We want to keep the properties configuration structure as well as an "advanced tuning" and override capabilities of the default choices. > Some more common options like sync/async indexing should probably be promoted to be controlled by the XML elements and configuration DSL excplicitly. -- This message was sent by Atlassian JIRA (v6.3.11#6341)

9 years, 11 months

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[JBoss JIRA] (ISPN-4286) Two concurrent putIfAbsent operations can both return null during rebalance

by William Burns (JIRA)

[ https://issues.jboss.org/browse/ISPN-4286?page=com.atlassian.jira.plugin.... ] William Burns updated ISPN-4286: -------------------------------- Fix Version/s: 7.2.0.Alpha1 (was: 7.1.0.Final) > Two concurrent putIfAbsent operations can both return null during rebalance > --------------------------------------------------------------------------- > > Key: ISPN-4286 > URL: https://issues.jboss.org/browse/ISPN-4286 > Project: Infinispan > Issue Type: Bug > Components: Core, State Transfer > Affects Versions: 6.0.2.Final > Reporter: Dan Berindei > Assignee: Dan Berindei > Priority: Critical > Fix For: 7.2.0.Alpha1 > > > If the cache topology changes while executing a putIfAbsent operation, the old primary owner will throw an OutdatedTopologyException, and the originator will retry on the new owner. > When retrying the PutKeyValueCommand on the new primary owner, we compare the current value with the command's new value. If they are equal, we assume that the initial command wrote the old value, and we return {{null}}. > However, the value might have been written by another putIfAbsent operation. So we could have two {{putIfAbsent(k, v)}} operations, both returning {{null}}. > {code} > A is the originator, B is the primary owner, k = null > A -> B: putIfAbsent(k, v1) > B dies before writing v, C is now primary owner > D -> C: putIfAbsent(k, v1) // another put operation from D, with the same value > C -> D: null // correct > A -> C: retry_putIfAbsent(k, v1) > C -> A: null // C assumes A is overwriting its own value, so it's also returning null > {code} -- This message was sent by Atlassian JIRA (v6.3.11#6341)

9 years, 11 months

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[JBoss JIRA] (ISPN-4167) DummyBaseTransactionManager doesn't clean up when rollback fails

by William Burns (JIRA)

[ https://issues.jboss.org/browse/ISPN-4167?page=com.atlassian.jira.plugin.... ] William Burns updated ISPN-4167: -------------------------------- Fix Version/s: 7.2.0.Alpha1 (was: 7.1.0.Final) > DummyBaseTransactionManager doesn't clean up when rollback fails > ---------------------------------------------------------------- > > Key: ISPN-4167 > URL: https://issues.jboss.org/browse/ISPN-4167 > Project: Infinispan > Issue Type: Bug > Components: Core > Affects Versions: 6.0.2.Final > Reporter: Dan Berindei > Assignee: Pedro Ruivo > Fix For: 7.2.0.Alpha1 > > > If the rollback fails, the thread local holding the current transaction is not cleared, and it becomes impossible to start a new transaction on the same thread. > One way this can happen is when Infinispan registers as a XA transaction, but DummyTransactionManager is not configured to use XA Xids: > {noformat} > 12:47:57,169 ERROR (testng-ReplicationExceptionTest:) [DummyTransaction] ISPN000098: Exception while rollback > java.lang.UnsupportedOperationException > at org.infinispan.transaction.tm.DummyNoXaXid.getBranchQualifier(DummyNoXaXid.java:30) > at org.infinispan.transaction.xa.recovery.SerializableXid.<init>(SerializableXid.java:37) > at org.infinispan.transaction.xa.TransactionXaAdapter.convertXid(TransactionXaAdapter.java:251) > at org.infinispan.transaction.xa.TransactionXaAdapter.rollback(TransactionXaAdapter.java:122) > at org.infinispan.transaction.tm.DummyTransaction.runRollback(DummyTransaction.java:281) > at org.infinispan.transaction.tm.DummyTransaction.rollback(DummyTransaction.java:88) > at org.infinispan.transaction.tm.DummyBaseTransactionManager.rollback(DummyBaseTransactionManager.java:104) > at org.infinispan.CacheImpl.tryRollback(CacheImpl.java:1442) > at org.infinispan.CacheImpl.executeCommandAndCommitIfNeeded(CacheImpl.java:1418) > at org.infinispan.CacheImpl.putInternal(CacheImpl.java:894) > at org.infinispan.CacheImpl.put(CacheImpl.java:886) > at org.infinispan.CacheImpl.put(CacheImpl.java:1461) > at org.infinispan.CacheImpl.put(CacheImpl.java:225) > at org.infinispan.tx.synchronisation.ReplicationExceptionTest.testSyncReplTimeout(ReplicationExceptionTest.java:54) > {noformat} -- This message was sent by Atlassian JIRA (v6.3.11#6341)

9 years, 11 months

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infinispan-issues January 2015