Hello,
thanks for your answer, I'm using the TX loop with success. Looks terribly
similar to a solution we developed for distributed transaction
on ORACLE many years ago, but works :-)
OConcurrentModificationException txException = null;
TX_LOOP:
for ( int txCount = 0; txCount < DBObjectManager.MAX_RETRIES;
txCount++ ) {
OrientGraph graph = ctx.getSession().getOrientDB().getTx();
try { // Database
OrientEdge link = ctx.getDbObjectManager().findEdge(
graph, linkObjectId );
graph.removeEdge( link );
graph.commit();
txException = null;
break TX_LOOP;
} catch ( OConcurrentModificationException exp ) {
LOG.info( "got concurrent modufication exception, retry
#" + (txCount +1) );
txException = exp;
continue TX_LOOP;
} finally {
graph.shutdown();
}
}
if ( txException != null ) {
throw new IllegalStateException( "failed to CutLink",
txException );
}
Am Dienstag, 15. Juli 2014 17:33:55 UTC+2 schrieb Carsten Zerbst:
>
> Hallo All,
>
> I'm using the graph API and get OConcurrentModificationException. I tried
> to disable the local cache anc mvcc, but without result.
> I'm using version 1.7.4.
>
> *Setup:*
>
> Server started with -Ddb.mvcc=false -Dcache.local.enabled=false
>
> Client started with -Ddb.mvcc=false -Dcache.local.enabled=false
>
> *Java code:*
>
> OrientGraph graph = ctx.getSession().getOrientDB().getTx();
>
> try {
>
> // Find parent and child based on unique attribute in DB
> OrientVertex parentVTX = ctx.getDbObjectManager().findVertex( graph, oid );
> OrientVertex childVTX = ctx.getDbObjectManager().findVertex( graph,
> childOID );
>
> OrientEdge edge = graph.addEdge( linkObjectId, parentVT, childVT,
> linkClassName );
>
> // set some properties
> graph.commit();
>
> } finally {
> graph.shutdown();
> }
>
> *Error message:*
>
> com.orientechnologies.orient.core.exception.OConcurrentModificationException:
> Cannot UPDATE the record #11:10 because the version is not the latest.
> Probably you are updating an old record or it has been modified by another
> user (db=v26 your=v25)
>
> The record #11:10 is the record of the parent vertex.
>
> What could I do, to avoid this problem ?
>
> Thank you, Carsten
>
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