[infinispan-issues] [JBoss JIRA] (ISPN-1983) putForExternalRead() not obeying the specification

[Galder Zamarreño (JIRA)]

     [ https://issues.jboss.org/browse/ISPN-1983?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on ISPN-1983 started by Galder Zamarreño.

> putForExternalRead() not obeying the specification
> --------------------------------------------------
>
>                 Key: ISPN-1983
>                 URL: https://issues.jboss.org/browse/ISPN-1983
>             Project: Infinispan
>          Issue Type: Bug
>          Components: Core API
>    Affects Versions: 5.1.3.FINAL
>            Reporter: Galder Zamarreño
>            Assignee: Galder Zamarreño
>             Fix For: 5.1.4.FINAL
>
>
> The javadoc says: "Only goes through if the key specified does not exist..."
> But, two consecutive calls for putForExternalRead result in the second one acting on the cache.
> 1st call:
> {code}
> 1444  TRACE [org.infinispan.interceptors.InvocationContextInterceptor] (main:replSync) Invoked with command PutKeyValueCommand{key=k, value=v, flags=[ZERO_LOCK_ACQUISITION_TIMEOUT, FORCE_ASYNCHRONOUS, FAIL_SILENTLY, PUT_FOR_EXTERNAL_READ], putIfAbsent=true, lifespanMillis=-1, maxIdleTimeMillis=-1} and InvocationContext [SingleKeyNonTxInvocationContext{flags=[ZERO_LOCK_ACQUISITION_TIMEOUT, FORCE_ASYNCHRONOUS, FAIL_SILENTLY, PUT_FOR_EXTERNAL_READ]}]
> 1444  TRACE [org.infinispan.statetransfer.StateTransferLockImpl] (main:replSync) Acquired shared state transfer shared lock, total holders: 1
> 1444  TRACE [org.infinispan.container.EntryFactoryImpl] (main:replSync) Exists in context? null 
> 1444  TRACE [org.infinispan.container.EntryFactoryImpl] (main:replSync) Retrieved from container null
> 1444  TRACE [org.infinispan.container.EntryFactoryImpl] (main:replSync) Creating new entry.
> 1446  TRACE [org.infinispan.interceptors.CallInterceptor] (main:replSync) Executing command: PutKeyValueCommand{key=k, value=v, flags=[ZERO_LOCK_ACQUISITION_TIMEOUT, FORCE_ASYNCHRONOUS, FAIL_SILENTLY, PUT_FOR_EXTERNAL_READ], putIfAbsent=true, lifespanMillis=-1, maxIdleTimeMillis=-1}.
> 1447  TRACE [org.infinispan.remoting.rpc.RpcManagerImpl] (main:replSync) NodeA-26945 broadcasting call PutKeyValueCommand{key=k, value=v, flags=[ZERO_LOCK_ACQUISITION_TIMEOUT, FORCE_ASYNCHRONOUS, FAIL_SILENTLY, PUT_FOR_EXTERNAL_READ], putIfAbsent=true, lifespanMillis=-1, maxIdleTimeMillis=-1} to recipient list null
> ...
> 1452  TRACE [org.infinispan.container.entries.ReadCommittedEntry] (main:replSync) Updating entry (key=k removed=false valid=true changed=true created=true value=v]
> 1453  TRACE [org.infinispan.interceptors.EntryWrappingInterceptor] (main:replSync) Committed entry ReadCommittedEntry(1436ae83){key=k, value=v, oldValue=null, isCreated=false, isChanged=false, isRemoved=false, isValid=true}
> {code}
> 2nd call:
> {code}
> 1453  TRACE [org.infinispan.interceptors.InvocationContextInterceptor] (main:replSync) Invoked with command PutKeyValueCommand{key=k, value=v, flags=[ZERO_LOCK_ACQUISITION_TIMEOUT, FORCE_ASYNCHRONOUS, FAIL_SILENTLY, PUT_FOR_EXTERNAL_READ], putIfAbsent=true, lifespanMillis=-1, maxIdleTimeMillis=-1} and InvocationContext [SingleKeyNonTxInvocationContext{flags=[ZERO_LOCK_ACQUISITION_TIMEOUT, FORCE_ASYNCHRONOUS, FAIL_SILENTLY, PUT_FOR_EXTERNAL_READ]}]
> 1453  TRACE [org.infinispan.remoting.InboundInvocationHandlerImpl] (Incoming-1,ISPN,NodeB-23417:) Calling perform() on SingleRpcCommand{cacheName='replSync', command=PutKeyValueCommand{key=k, value=v, flags=[ZERO_LOCK_ACQUISITION_TIMEOUT, FORCE_ASYNCHRONOUS, FAIL_SILENTLY, PUT_FOR_EXTERNAL_READ], putIfAbsent=false, lifespanMillis=-1, maxIdleTimeMillis=-1}}
> 1453  TRACE [org.infinispan.container.EntryFactoryImpl] (main:replSync) Exists in context? null 
> 1453  TRACE [org.infinispan.container.EntryFactoryImpl] (main:replSync) Retrieved from container ImmortalCacheEntry{key=k, value=ImmortalCacheValue {value=v}}
> 1454  TRACE [org.infinispan.interceptors.CallInterceptor] (main:replSync) Executing command: PutKeyValueCommand{key=k, value=v, flags=[ZERO_LOCK_ACQUISITION_TIMEOUT, FORCE_ASYNCHRONOUS, FAIL_SILENTLY, PUT_FOR_EXTERNAL_READ], putIfAbsent=true, lifespanMillis=-1, maxIdleTimeMillis=-1}.
> 1454  TRACE [org.infinispan.container.entries.ReadCommittedEntry] (main:replSync) Updating entry (key=k removed=false valid=true changed=true created=false value=v]
> 1454  TRACE [org.infinispan.interceptors.EntryWrappingInterceptor] (main:replSync) Committed entry ReadCommittedEntry(7f2ea1dd){key=k, value=v, oldValue=null, isCreated=false, isChanged=false, isRemoved=false, isValid=true}
> {code}
> Why is updating an entry if if the value is already present? It shouldn't do that.
> Even further, in the case of putForExternalRead() the previous value is not needed since we don't return it, so it should not even retrieve it from the container. Just checking if it's present should be enough. This is in contrast to a normal putIfAbsent() call.

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