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[CDO]Error while prefetch lock state [message #1853140]

Mon, 20 June 2022 07:26

fang li

Messages: 5
Registered: April 2022

Junior Member

Hi,

I have some problems whit LockStateIndication.

My EMF model:
Model A , feature(EReference) ownedB , lower bound 0,upper bound 1 , containment = true.
Model B

I create a new B in Model A , than I commit.
Then I delete the B , and commit again.

LockStateIndication will have a NullPointerException.

The method prefetchLockStates(int depth, CDOID id)
Object value = revision.getValue(reference);
The value would be CDOIDNullImpl.

How to solve this problem.

Error details:
Caused by: java.lang.NullPointerException
at org.eclipse.emf.cdo.server.internal.net4j.protocol.LockStateIndication.prefetchLockStates(LockStateIndic
ation.java: 97)
at og.ecliose.emf.cdo.server.internal.net4j.protocol.lockStateIndication.prefetchLockStates(LockStateIndication.java:108)at ong.eclipse.emf.cdo.server.internal.net4j.protocol.LockStateIndication.prefetchLockStates(LockStateIndic
ation.java: 120)
at ong.eclipse.emf .cdo.server .internal.net4j.protocol.LockStateIndication.prefetchLockStates(LockStateIndi
ation.java : 120)
at ong.eclipse.emf .cdo.server .internal.net4j.protocol.LockStateIndication.prefetchLockStates(LockStateIndic
ation.java: 108)
at ong.eclipse.emf .cdo.server .internal.net4j.protocol.LockStateIndication.prefetchLockStates(LockStateIndi
ation.java: 120)
at org.eclipse.emf .cdo.server.internal.net4j.protocol.LockStateIndication.prefetchLockStates(LockStateIndic
ation.java: 120)
at ong.eclipse.emf.cdo.server.internal.net4j.protocol.LockStateIndication.prefetchLockStates(LockStateIndic
ation.java: 120)
at ong.eclipse.emf .cdo.server.internal.net4j. protocol.LockStateIndication.indicating(LockStateIndication.ja
va:82)
at org.eclipse.emf . cdo.server .internal.net4j.protoco1.cOOServerIndication.indicating(CDOServerIndication .ji
va : 107)
at org.eclipse.net4j.signal.IndicationMithResponse.doExtendedInput(IndicationwithResponse.java:100)
at org.eclipse.net4j.signal.signal.doInput(Signal.java: 391)
at ong.eclipse.net4j.signal.IndicationWithResponse.execute(IndicationMithResponse.java:73)
at org.eclipse.emf. cdo.server. internal.net4j.protocol.CDOServerReadIndication.execute(CDOServerReadIndication.java:36)... 5 more

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Re: [CDO]Error while prefetch lock state [message #1853143 is a reply to message #1853140]

Mon, 20 June 2022 08:54

Eike Stepper

Messages: 6682
Registered: July 2009

Senior Member

The stacktrace you've provided is not only badly chopped, it's also fully of typos, e.g., og.ecliose, lockStateIndication, protoco1.cOOServerIndication.
And the line numbers apparently don't match the current sources.

How did you create that stacktrace and what version of CDO are you using?
Are you sure that client and server uses CDO plugins from the same release?

Cheers
/Eike

----
http://www.esc-net.de
http://thegordian.blogspot.com
http://twitter.com/eikestepper

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