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https://issues.apache.org/jira/browse/BROOKLYN-568?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16282183#comment-16282183
]
ASF GitHub Bot commented on BROOKLYN-568:
-----------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/brooklyn-server/pull/912
> Rebind failed: NPE deserializing SshFeed
> ----------------------------------------
>
> Key: BROOKLYN-568
> URL: https://issues.apache.org/jira/browse/BROOKLYN-568
> Project: Brooklyn
> Issue Type: Bug
> Affects Versions: 0.12.0
> Reporter: Aled Sage
> Assignee: Aled Sage
>
> With Brooklyn 1.0.0-SNAPSHOT, I tried rebinding to some persisted state from
> 0.12.0. However, rebind failed to deserialize an {{SsshFeed}} with the
> exception below:
> {noformat}
> 2017-11-25T22:03:31,781 WARN 123 o.a.b.c.m.r.RebindExceptionHandlerImpl
> [ooklyn-persister] problem loading memento: memento kscyylt8h9 (FEED)
> deserialization error; continuing:
> com.thoughtworks.xstream.converters.ConversionException: C
> ould not call com.google.common.collect.HashMultimap.readObject() : null
> ---- Debugging information ----
> message : Could not call
> com.google.common.collect.HashMultimap.readObject()
> cause-exception : java.lang.NullPointerException
> cause-message : null
> class : com.google.common.collect.HashMultimap
> required-type : com.google.common.collect.HashMultimap
> converter-type :
> com.thoughtworks.xstream.converters.reflection.SerializableConverter
> path :
> /feed/config/polls/com.google.guava:com.google.common.collect.HashMultimap/com.google.guava:com.google.common.collect.HashMultimap
> line number : 135
> class[1] : java.util.LinkedHashMap
> converter-type[1] :
> org.apache.brooklyn.util.core.xstream.StringKeyMapConverter
> class[2] :
> org.apache.brooklyn.core.mgmt.rebind.dto.BasicFeedMemento
> converter-type[2] :
> com.thoughtworks.xstream.converters.reflection.ReflectionConverter
> version : 1.0.0-20171113.0927
> -------------------------------
> com.thoughtworks.xstream.converters.ConversionException: Could not call
> com.google.common.collect.HashMultimap.readObject() : null
> ---- Debugging information ----
> message : Could not call
> com.google.common.collect.HashMultimap.readObject()
> cause-exception : java.lang.NullPointerException
> cause-message : null
> class : com.google.common.collect.HashMultimap
> required-type : com.google.common.collect.HashMultimap
> converter-type :
> com.thoughtworks.xstream.converters.reflection.SerializableConverter
> path :
> /feed/config/polls/com.google.guava:com.google.common.collect.HashMultimap/com.google.guava:com.google.common.collect.HashMultimap
> line number : 135
> class[1] : java.util.LinkedHashMap
> converter-type[1] :
> org.apache.brooklyn.util.core.xstream.StringKeyMapConverter
> class[2] :
> org.apache.brooklyn.core.mgmt.rebind.dto.BasicFeedMemento
> converter-type[2] :
> com.thoughtworks.xstream.converters.reflection.ReflectionConverter
> version : 1.0.0-20171113.0927
> -------------------------------
> at
> com.thoughtworks.xstream.core.util.SerializationMembers.callReadObject(SerializationMembers.java:133)
> [269:xstream:1.4.8]
> at
> com.thoughtworks.xstream.converters.reflection.SerializableConverter.doUnmarshal(SerializableConverter.java:455)
> [269:xstream:1.4.8]
> at
> com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:263)
> [269:xstream:1.4.8]
> at
> com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
> [269:xstream:1.4.8]
> at
> com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:65)
> [269:xstream:1.4.8]
> at
> com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
> [269:xstream:1.4.8]
> at
> com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50)
> [269:xstream:1.4.8]
> at
> com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.readItem(AbstractCollectionConverter.java:71)
> [269:xstream:1.4.8]
> at
> org.apache.brooklyn.util.core.xstream.StringKeyMapConverter.unmarshalStringKey(StringKeyMapConverter.java:120)
> [123:org.apache.brooklyn.core:1.0.0.20171113_0927]
> at
> org.apache.brooklyn.util.core.xstream.StringKeyMapConverter.unmarshalEntry(StringKeyMapConverter.java:111)
> [123:org.apache.brooklyn.core:1.0.0.20171113_0927]
> at
> org.apache.brooklyn.util.core.xstream.MapConverter.populateMap(MapConverter.java:89)
> [123:org.apache.brooklyn.core:1.0.0.20171113_0927]
> at
> com.thoughtworks.xstream.converters.collections.MapConverter.unmarshal(MapConverter.java:87)
> [269:xstream:1.4.8]
> at
> com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
> [269:xstream:1.4.8]
> at
> com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:65)
> [269:xstream:1.4.8]
> at
> com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
> [269:xstream:1.4.8]
> at
> com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshallField(AbstractReflectionConverter.java:480)
> [269:xstream:1.4.8]
> at
> com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:412)
> [269:xstream:1.4.8]
> at
> com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:263)
> [269:xstream:1.4.8]
> at
> com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
> [269:xstream:1.4.8]
> at
> com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:65)
> [269:xstream:1.4.8]
> at
> com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
> [269:xstream:1.4.8]
> at
> com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50)
> [269:xstream:1.4.8]
> at
> com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:134)
> [269:xstream:1.4.8]
> at
> com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarshal(AbstractTreeMarshallingStrategy.java:32)
> [269:xstream:1.4.8]
> at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1206)
> [269:xstream:1.4.8]
> at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1190)
> [269:xstream:1.4.8]
> at com.thoughtworks.xstream.XStream.fromXML(XStream.java:1061)
> [269:xstream:1.4.8]
> at
> org.apache.brooklyn.util.core.xstream.XmlSerializer.deserialize(XmlSerializer.java:167)
> [123:org.apache.brooklyn.core:1.0.0.20171113_0927]
> at
> org.apache.brooklyn.util.core.xstream.XmlSerializer.fromString(XmlSerializer.java:177)
> [123:org.apache.brooklyn.core:1.0.0.20171113_0927]
> at
> org.apache.brooklyn.core.mgmt.persist.RetryingMementoSerializer.fromString(RetryingMementoSerializer.java:71)
> [123:org.apache.brooklyn.core:1.0.0.20171113_0927]
> at
> org.apache.brooklyn.core.mgmt.persist.BrooklynMementoPersisterToObjectStore$4.visit(BrooklynMementoPersisterToObjectStore.java:482)
> [123:org.apache.brooklyn.core:1.0.0.20171113_0927]
> at
> org.apache.brooklyn.core.mgmt.persist.BrooklynMementoPersisterToObjectStore$1VisitorWrapper.run(BrooklynMementoPersisterToObjectStore.java:536)
> [123:org.apache.brooklyn.core:1.0.0.20171113_0927]
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:?]
> at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:?]
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> [?:?]
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> [?:?]
> at java.lang.Thread.run(Thread.java:748) [?:?]
> Caused by: java.lang.NullPointerException
> at
> org.apache.brooklyn.core.sensor.ssh.SshCommandSensor.makeCommandExecutingInDirectory(SshCommandSensor.java:160)
> ~[?:?]
> at
> org.apache.brooklyn.core.sensor.ssh.SshCommandSensor$2.get(SshCommandSensor.java:128)
> ~[?:?]
> at
> org.apache.brooklyn.core.sensor.ssh.SshCommandSensor$2.get(SshCommandSensor.java:125)
> ~[?:?]
> at
> org.apache.brooklyn.feed.CommandPollConfig.toStringPollSource(CommandPollConfig.java:170)
> ~[?:?]
> at
> org.apache.brooklyn.core.feed.FeedConfig.equalsFields(FeedConfig.java:281)
> ~[?:?]
> at
> org.apache.brooklyn.core.feed.PollConfig.equalsFields(PollConfig.java:83)
> ~[?:?]
> at
> org.apache.brooklyn.feed.CommandPollConfig.equalsFields(CommandPollConfig.java:174)
> ~[?:?]
> at
> org.apache.brooklyn.core.feed.FeedConfig.hashCode(FeedConfig.java:289) ~[?:?]
> at java.util.HashMap.hash(HashMap.java:338) ~[?:?]
> at java.util.HashMap.put(HashMap.java:611) ~[?:?]
> at java.util.HashSet.add(HashSet.java:219) ~[?:?]
> at
> com.google.common.collect.AbstractMapBasedMultimap$WrappedCollection.add(AbstractMapBasedMultimap.java:505)
> ~[?:?]
> at
> com.google.common.collect.Serialization.populateMultimap(Serialization.java:190)
> ~[?:?]
> at
> com.google.common.collect.HashMultimap.readObject(HashMultimap.java:137)
> ~[?:?]
> at sun.reflect.GeneratedMethodAccessor89.invoke(Unknown Source) ~[?:?]
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> ~[?:?]
> at java.lang.reflect.Method.invoke(Method.java:498) ~[?:?]
> at
> com.thoughtworks.xstream.core.util.SerializationMembers.callReadObject(SerializationMembers.java:125)
> ~[?:?]
> ... 36 more
> {noformat}
> The feed throwing the exception was:
> {noformat}
> <uniqueTag>SshFeed[ssh[source
> /var/run/flannel/subne.../65bb2d4b->flannel.mtu]]</uniqueTag>
> {noformat}
> That feed's {{SshCommandSensor}} has
> {{<val_-entity>aqo7xbff1n</val_-entity>}}, but that entity doesn't exist in
> the persisted state. In fact the feed is orphaned: it is not referenced by
> any entity. The {{entity}} field is therefore null.
> The actual NPE is due to a bad implementation of {{FeedConfig.hashCode}}. By
> calling {{toStringPollSource}}, which calls {{getCommandSupplier().get()}}.
> But this tries to use a reference to entity
> {{<val_-entity>aqo7xbff1n</val_-entity>}}, which is null.
> Note that with the default persistence configuration, the deserialization of
> the feed is logged but rebind will continue. The error therefore does not
> cause a serious problem (because the feed is orphaned anyway, we don't care).
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