[JBoss JIRA] (ISPN-4949) Split brain: inconsistent data after merge
by Bela Ban (JIRA)
[ https://issues.jboss.org/browse/ISPN-4949?page=com.atlassian.jira.plugin.... ]
Bela Ban commented on ISPN-4949:
--------------------------------
Do you have a timeout waiting for all ACKs ?
E.g what do you do in the following case: ?
* View ABCD, and D crashes
* You send a prepare(ABC) to ABC
* C enters heavy GC activity and isn't able to reply before the timeout elapses
** However, C is *not* suspected (the GC cycle is too short for FD, but too long for the prepare RPC) !
* So A gets ACKs from itself and B, but not from C
* A doesn't install the view (at the ISPN level)
* There is no subsequent view from JGroups; the view remains ABC
How's this case handled ?
> Split brain: inconsistent data after merge
> ------------------------------------------
>
> Key: ISPN-4949
> URL: https://issues.jboss.org/browse/ISPN-4949
> Project: Infinispan
> Issue Type: Bug
> Components: State Transfer
> Affects Versions: 7.0.0.Final
> Reporter: Radim Vansa
> Assignee: Dan Berindei
> Priority: Critical
> Fix For: 7.1.0.Alpha1
>
>
> 1) cluster A, B, C, D splits into 2 parts:
> A, B (coord A) finds this out immediately and enters degraded mode with CH [A, B, C, D]
> C, D (coord D) first detects that B is lost, gets view A, C, D and starts rebalance with CH [A, C, D]. Segment X is primary owned by C (it had backup on B but this got lost)
> 2) D detects that A was lost as well, therefore enters degraded mode with CH [A, C, D]
> 3) C inserts entry into X: all owners (only C) is present, therefore the modification is allowed
> 4) cluster is merged and coordinator finds out that the max stable topology has CH [A, B, C, D] (it is the older of the two partitions' topologies, got from A, B) - logs 'No active or unavailable partitions, so all the partitions must be in degraded mode' (yes, all partitions are in degraded mode, but write has happened in the meantime)
> 5) The old CH is broadcast in newest topology, no rebalance happens
> 6) Inconsistency: read in X may miss the update
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[JBoss JIRA] (ISPN-4949) Split brain: inconsistent data after merge
by Dan Berindei (JIRA)
[ https://issues.jboss.org/browse/ISPN-4949?page=com.atlassian.jira.plugin.... ]
Dan Berindei commented on ISPN-4949:
------------------------------------
Yeah, the PR is pretty hairy because the fix included a stress test that uncovered some other problems.
The solution is the one I described in my previous comment: whenever we receive a new JGroups view, we request an ACK from all the members of the view. If all the members confirm they are available, we install the cache topology without the leavers and apply the partition handling availability check. If a node is suspected, we give up, assuming that we will receive a new JGroups view soon.
> Split brain: inconsistent data after merge
> ------------------------------------------
>
> Key: ISPN-4949
> URL: https://issues.jboss.org/browse/ISPN-4949
> Project: Infinispan
> Issue Type: Bug
> Components: State Transfer
> Affects Versions: 7.0.0.Final
> Reporter: Radim Vansa
> Assignee: Dan Berindei
> Priority: Critical
> Fix For: 7.1.0.Alpha1
>
>
> 1) cluster A, B, C, D splits into 2 parts:
> A, B (coord A) finds this out immediately and enters degraded mode with CH [A, B, C, D]
> C, D (coord D) first detects that B is lost, gets view A, C, D and starts rebalance with CH [A, C, D]. Segment X is primary owned by C (it had backup on B but this got lost)
> 2) D detects that A was lost as well, therefore enters degraded mode with CH [A, C, D]
> 3) C inserts entry into X: all owners (only C) is present, therefore the modification is allowed
> 4) cluster is merged and coordinator finds out that the max stable topology has CH [A, B, C, D] (it is the older of the two partitions' topologies, got from A, B) - logs 'No active or unavailable partitions, so all the partitions must be in degraded mode' (yes, all partitions are in degraded mode, but write has happened in the meantime)
> 5) The old CH is broadcast in newest topology, no rebalance happens
> 6) Inconsistency: read in X may miss the update
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[JBoss JIRA] (ISPN-5061) Cross site state transfer - NPE on consumer site when backup cache is local
by Pedro Ruivo (JIRA)
[ https://issues.jboss.org/browse/ISPN-5061?page=com.atlassian.jira.plugin.... ]
Pedro Ruivo updated ISPN-5061:
------------------------------
Summary: Cross site state transfer - NPE on consumer site when backup cache is local (was: Cross site state transfer - NPE on consumer site when backup cache is not present)
> Cross site state transfer - NPE on consumer site when backup cache is local
> ---------------------------------------------------------------------------
>
> Key: ISPN-5061
> URL: https://issues.jboss.org/browse/ISPN-5061
> Project: Infinispan
> Issue Type: Bug
> Components: State Transfer
> Affects Versions: 7.1.0.Alpha1
> Reporter: Matej Čimbora
> Assignee: Pedro Ruivo
>
> NPE detected on consumer site after invoking push operation on producer site. Occurs when corresponding cache does not exist on consumer site (either with the same name as the main cache or specified via <backup-for> option).
> Configuration:
> 2 sites, BRN (main), LON (backup)
> Producer site CLI:
> Unable to pushState to 'LON'. org.infinispan.commons.CacheException: Problems invoking command.
> Consumer site log:
> 11:18:45,245 WARN [org.infinispan.remoting.transport.jgroups.CommandAwareRpcDispatcher] (remote-thread--p3-t1) ISPN000071: Caught exception when handling command XSiteStateTransferControlCommand{control=START_RECEIVE, siteName='LON', statusOk=false, cacheName='lonCache'}: java.lang.NullPointerException
> at org.infinispan.xsite.BackupReceiverImpl.invokeRemotelyInLocalSite(BackupReceiverImpl.java:213) [infinispan-core.jar:7.1.0.Alpha1]
> at org.infinispan.xsite.BackupReceiverImpl.handleStateTransferControl(BackupReceiverImpl.java:90) [infinispan-core.jar:7.1.0.Alpha1]
> at org.infinispan.xsite.statetransfer.XSiteStateTransferControlCommand.performInLocalSite(XSiteStateTransferControlCommand.java:41) [infinispan-core.jar:7.1.0.Alpha1]
> at org.infinispan.remoting.transport.jgroups.CommandAwareRpcDispatcher$3.run(CommandAwareRpcDispatcher.java:252) [infinispan-core.jar:7.1.0.Alpha1]
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_60]
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_60]
> at java.lang.Thread.run(Thread.java:745) [rt.jar:1.7.0_60]
> 11:18:45,420 WARN [org.infinispan.remoting.transport.jgroups.CommandAwareRpcDispatcher] (remote-thread--p3-t1) ISPN000071: Caught exception when handling command XSiteStateTransferControlCommand{control=FINISH_RECEIVE, siteName='LON', statusOk=false, cacheName='lonCache'}: java.lang.NullPointerException
> at org.infinispan.xsite.BackupReceiverImpl.invokeRemotelyInLocalSite(BackupReceiverImpl.java:213) [infinispan-core.jar:7.1.0.Alpha1]
> at org.infinispan.xsite.BackupReceiverImpl.handleStateTransferControl(BackupReceiverImpl.java:90) [infinispan-core.jar:7.1.0.Alpha1]
> at org.infinispan.xsite.statetransfer.XSiteStateTransferControlCommand.performInLocalSite(XSiteStateTransferControlCommand.java:41) [infinispan-core.jar:7.1.0.Alpha1]
> at org.infinispan.remoting.transport.jgroups.CommandAwareRpcDispatcher$3.run(CommandAwareRpcDispatcher.java:252) [infinispan-core.jar:7.1.0.Alpha1]
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_60]
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_60]
> at java.lang.Thread.run(Thread.java:745) [rt.jar:1.7.0_60]
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[JBoss JIRA] (ISPN-5035) DeltaAware support for conditional operations
by Radim Vansa (JIRA)
[ https://issues.jboss.org/browse/ISPN-5035?page=com.atlassian.jira.plugin.... ]
Radim Vansa commented on ISPN-5035:
-----------------------------------
I'd assume that the code using cache.replace would look like
{code}
Foo oldFoo = cache.get("foo");
Foo newFoo = new Foo(oldFoo).addBar("bar");
boolean succeeded = cache.replace("foo", oldFoo, newFoo);
{code}
As during replication any DeltaAware command parameter is replaced by Delta, currently we would send cache.replace("foo", zero-delta, delta-with-bar) and get false since zero-delta does not match the object. I think that we should not produce the zero-delta from oldFoo (only the one with delta-with-bar), and the replace should work as if Foo did not implement DeltaAware.
Anyway, I don't think I would like to use DeltaAware for such use-case anyway. My concern is just that the API is not consistent.
> DeltaAware support for conditional operations
> ---------------------------------------------
>
> Key: ISPN-5035
> URL: https://issues.jboss.org/browse/ISPN-5035
> Project: Infinispan
> Issue Type: Feature Request
> Components: Core
> Reporter: Radim Vansa
>
> Current delta-aware approach is implemented only in PutKeyValueCommand and ApplyDeltaCommand. This implementation does not allow to execute conditional delta-aware commands - or rather it does not allow to return any kind of value (the condition itself can be implemented inside the delta).
> One use-case when this would be required is equivalent of AtomicLong.getAndIncrement(). Currently we can implement this using
> {code}
> Long previous;
> do {
> previous = cache.get(key);
> } while (cache.replace(key, previous, previous + 1);
> {code}
> which requires at least two RPCs. With more generic interface, such as JCache's EntryProcessor this could be implemented using single RPC.
> (so, this JIRA is basically a request to native support for EntryProcessor)
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[JBoss JIRA] (ISPN-4500) Karaf cause OOME when running iOSGI integration tests on all environments
by RH Bugzilla Integration (JIRA)
[ https://issues.jboss.org/browse/ISPN-4500?page=com.atlassian.jira.plugin.... ]
RH Bugzilla Integration commented on ISPN-4500:
-----------------------------------------------
Martin Gencur <mgencur(a)redhat.com> changed the Status of [bug 1118593|https://bugzilla.redhat.com/show_bug.cgi?id=1118593] from NEW to POST
> Karaf cause OOME when running iOSGI integration tests on all environments
> -------------------------------------------------------------------------
>
> Key: ISPN-4500
> URL: https://issues.jboss.org/browse/ISPN-4500
> Project: Infinispan
> Issue Type: Bug
> Components: Integration
> Affects Versions: 7.0.0.Alpha3, 7.0.0.Alpha4
> Environment: Windows, Solaris, RHEL
> Reporter: Vitalii Chepeliuk
> Assignee: Ion Savin
> Labels: testsuite_stability
>
> Karaf is parsing XML file and can not fing closing </hr> tag. There should be no <hr> tag at all. Then it throws following exception
> {noformat}
> org.xml.sax.SAXParseException; lineNumber: 6; columnNumber: 3; The element type "hr" must be terminated by the matching end-tag "</hr>".
> at org.apache.xerces.parsers.DOMParser.parse(Unknown Source)
> at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source)
> at javax.xml.parsers.DocumentBuilder.parse(Unknown Source)
> at org.apache.karaf.features.internal.FeatureValidationUtil.validate(FeatureValidationUtil.java:52)
> at org.apache.karaf.features.internal.FeaturesServiceImpl.validateRepository(FeaturesServiceImpl.java:215)
> at org.apache.karaf.features.internal.FeaturesServiceImpl.internalAddRepository(FeaturesServiceImpl.java:257)
> at org.apache.karaf.features.internal.FeaturesServiceImpl.addRepository(FeaturesServiceImpl.java:237)
> at org.apache.karaf.features.internal.FeaturesServiceImpl.addRepository(FeaturesServiceImpl.java:225)
> at org.infinispan.it.osgi.features.OSGiKarafFeaturesTest.checkInstall(OSGiKarafFeaturesTest.java:87)
> at org.infinispan.it.osgi.features.OSGiKarafFeaturesTest.testCleanInstall(OSGiKarafFeaturesTest.java:71)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:606)
> at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
> at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
> at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
> at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
> at org.ops4j.pax.exam.invoker.junit.internal.ContainerTestRunner.runChild(ContainerTestRunner.java:67)
> at org.ops4j.pax.exam.invoker.junit.internal.ContainerTestRunner.runChild(ContainerTestRunner.java:37)
> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
> at org.junit.runner.JUnitCore.run(JUnitCore.java:160)
> at org.junit.runner.JUnitCore.run(JUnitCore.java:138)
> at org.ops4j.pax.exam.invoker.junit.internal.JUnitProbeInvoker.invokeViaJUnit(JUnitProbeInvoker.java:124)
> at org.ops4j.pax.exam.invoker.junit.internal.JUnitProbeInvoker.findAndInvoke(JUnitProbeInvoker.java:97)
> at org.ops4j.pax.exam.invoker.junit.internal.JUnitProbeInvoker.call(JUnitProbeInvoker.java:73)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:606)
> at org.ops4j.pax.exam.rbc.internal.RemoteBundleContextImpl.remoteCall(RemoteBundleContextImpl.java:80)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:606)
> at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:322)
> at sun.rmi.transport.Transport$1.run(Transport.java:177)
> at sun.rmi.transport.Transport$1.run(Transport.java:174)
> at java.security.AccessController.doPrivileged(Native Method)
> at sun.rmi.transport.Transport.serviceCall(Transport.java:173)
> at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:556)
> at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:811)
> at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:670)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:744)
> {noformat}
> Very often EOF Exceotion is thrown
> {noformat}
> java.io.EOFException
> at java.io.ObjectInputStream$BlockDataInputStream.peekByte(ObjectInputStream.java:2598)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1318)
> at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990)
> at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:500)
> at java.lang.Throwable.readObject(Throwable.java:914)
> at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:606)
> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1017)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1893)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
> at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990)
> at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:500)
> at java.lang.Throwable.readObject(Throwable.java:914)
> at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:606)
> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1017)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1893)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
> at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1915)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
> at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:244)
> at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:161)
> at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:194)
> at java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:148)
> at com.sun.proxy.$Proxy20.remoteCall(Unknown Source)
> at org.ops4j.pax.exam.rbc.client.intern.RemoteBundleContextClientImpl$1.invoke(RemoteBundleContextClientImpl.java:101)
> at com.sun.proxy.$Proxy21.call(Unknown Source)
> at org.ops4j.pax.exam.rbc.client.intern.RemoteBundleContextClientImpl.call(RemoteBundleContextClientImpl.java:268)
> at org.ops4j.pax.exam.container.remote.RBCRemoteTarget.call(RBCRemoteTarget.java:65)
> at org.ops4j.pax.exam.karaf.container.internal.KarafTestContainer.call(KarafTestContainer.java:533)
> at org.ops4j.pax.exam.spi.reactors.SingletonStagedReactor.invoke(SingletonStagedReactor.java:113)
> at org.ops4j.pax.exam.spi.reactors.PerSuiteStagedReactor.invoke(PerSuiteStagedReactor.java:47)
> at org.ops4j.pax.exam.junit.impl.ProbeRunner$2.evaluate(ProbeRunner.java:278)
> at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
> at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
> at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
> at org.ops4j.pax.exam.junit.impl.ProbeRunner.run(ProbeRunner.java:112)
> at org.ops4j.pax.exam.junit.PaxExam.run(PaxExam.java:93)
> at org.junit.runners.Suite.runChild(Suite.java:127)
> at org.junit.runners.Suite.runChild(Suite.java:26)
> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
> at java.util.concurrent.Executors$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}
> And finally is start to leak memory and end up with
> {noformat}
> java.lang.OutOfMemoryError: Java heap space
> {noformat}
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[JBoss JIRA] (ISPN-4949) Split brain: inconsistent data after merge
by Bela Ban (JIRA)
[ https://issues.jboss.org/browse/ISPN-4949?page=com.atlassian.jira.plugin.... ]
Bela Ban commented on ISPN-4949:
--------------------------------
Out of curiosity: what was the solution you picked, Dan ? Can you give a quick summary here ? I don't want to look into the PR...
> Split brain: inconsistent data after merge
> ------------------------------------------
>
> Key: ISPN-4949
> URL: https://issues.jboss.org/browse/ISPN-4949
> Project: Infinispan
> Issue Type: Bug
> Components: State Transfer
> Affects Versions: 7.0.0.Final
> Reporter: Radim Vansa
> Assignee: Dan Berindei
> Priority: Critical
> Fix For: 7.1.0.Alpha1
>
>
> 1) cluster A, B, C, D splits into 2 parts:
> A, B (coord A) finds this out immediately and enters degraded mode with CH [A, B, C, D]
> C, D (coord D) first detects that B is lost, gets view A, C, D and starts rebalance with CH [A, C, D]. Segment X is primary owned by C (it had backup on B but this got lost)
> 2) D detects that A was lost as well, therefore enters degraded mode with CH [A, C, D]
> 3) C inserts entry into X: all owners (only C) is present, therefore the modification is allowed
> 4) cluster is merged and coordinator finds out that the max stable topology has CH [A, B, C, D] (it is the older of the two partitions' topologies, got from A, B) - logs 'No active or unavailable partitions, so all the partitions must be in degraded mode' (yes, all partitions are in degraded mode, but write has happened in the meantime)
> 5) The old CH is broadcast in newest topology, no rebalance happens
> 6) Inconsistency: read in X may miss the update
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