Dear Sir or Madam,
Tuscany DAS 1.0 beta2 may have concurrent Modification problem under
stress testing environment
The following Exception at
org.eclipse.emf.common.util.BasicEList$EIterator.checkModCount(BasicELis
t.java:1327)
surely occurred when concurrently invoke
org.apache.tuscany.das.rdb.impl.DASFactoryImpl.createDAS
Test Case 1:
Generated 10 threads concurrently, each thread does 100 insert commands
in loop, 500 request in total, finally I got 55 request failed, above
11% fail rate, all was caused by the following exception
Test Case 2:
Generated 2 threads concurrently, each thread does 100 insert commands
in loop, 200 request in total, finally I got 5 request failed, about
2.5% fail rate, all was caused by the following exception
WAS CE 2.0.0.2
CPU 1.4MHZ centrino, 1.25G memory(512m was used on WAS CE server
instance)
SYBASE 12.5
DAS was configured using database pool on WASCE
I am wondering if there would be a hot fix on it
Thank you
Best Regards
Michael
java.util.ConcurrentModificationException
at
org.eclipse.emf.common.util.BasicEList$EIterator.checkModCount(BasicELis
t.java:1327)
at
org.eclipse.emf.common.util.BasicEList$EIterator.next(BasicEList.java:12
75)
at
org.eclipse.xsd.impl.XSDSchemaImpl.changeReference(XSDSchemaImpl.java:24
32)
at
org.eclipse.xsd.impl.XSDConcreteComponentImpl.eNotify(XSDConcreteCompone
ntImpl.java:1221)
at
org.eclipse.emf.ecore.util.EcoreEList.dispatchNotification(EcoreEList.ja
va:234)
at
org.eclipse.emf.common.notify.impl.NotifyingListImpl.addUnique(Notifying
ListImpl.java:302)
at org.eclipse.emf.common.util.BasicEList.add(BasicEList.java:600)
at
org.eclipse.xsd.impl.XSDSchemaImpl.imported(XSDSchemaImpl.java:2985)
at
org.eclipse.xsd.impl.XSDImportImpl.handleResolvedSchema(XSDImportImpl.ja
va:424)
at
org.eclipse.xsd.impl.XSDSchemaDirectiveImpl.resolve(XSDSchemaDirectiveIm
pl.java:387)
at
org.eclipse.xsd.impl.XSDImportImpl.importSchema(XSDImportImpl.java:411)
at
org.eclipse.xsd.impl.XSDSchemaImpl.resolveSchema(XSDSchemaImpl.java:2136
)
at
org.eclipse.xsd.impl.XSDSchemaImpl.resolveNamedComponent(XSDSchemaImpl.j
ava:2164)
at
org.eclipse.xsd.impl.XSDSchemaImpl.resolveSimpleTypeDefinition(XSDSchema
Impl.java:2240)
at
org.eclipse.xsd.impl.XSDConcreteComponentImpl.resolveSimpleTypeDefinitio
n(XSDConcreteComponentImpl.java:2374)
at
org.eclipse.xsd.impl.XSDAttributeDeclarationImpl.patch(XSDAttributeDecla
rationImpl.java:189)
at
org.eclipse.xsd.impl.XSDConcreteComponentImpl.patch(XSDConcreteComponent
Impl.java:526)
at org.eclipse.xsd.impl.XSDSchemaImpl.patch(XSDSchemaImpl.java:1505)
at
org.eclipse.xsd.impl.XSDSchemaImpl.changeAttribute(XSDSchemaImpl.java:23
35)
at
org.eclipse.xsd.impl.XSDConcreteComponentImpl.eNotify(XSDConcreteCompone
ntImpl.java:1240)
at
org.eclipse.xsd.impl.XSDSchemaImpl.setSchemaLocation(XSDSchemaImpl.java:
829)
at
org.eclipse.xsd.util.XSDResourceImpl.doLoad(XSDResourceImpl.java:756)
at
org.eclipse.xsd.util.XSDResourceImpl.load(XSDResourceImpl.java:617)
at
org.apache.tuscany.sdo.helper.XSDHelperImpl.define(XSDHelperImpl.java:23
3)
at
org.apache.tuscany.sdo.helper.XSDHelperImpl.define(XSDHelperImpl.java:22
4)
at
org.apache.tuscany.das.rdb.impl.CommandImpl.<init>(CommandImpl.java:50)
at
org.apache.tuscany.das.rdb.impl.CommandImpl.<init>(CommandImpl.java:59)
at
org.apache.tuscany.das.rdb.impl.WriteCommandImpl.<init>(WriteCommandImpl
.java:37)
at
org.apache.tuscany.das.rdb.impl.InsertCommandImpl.<init>(InsertCommandIm
pl.java:30)
at org.apache.tuscany.das.rdb.impl.DASImpl.<init>(DASImpl.java:81)
at org.apache.tuscany.das.rdb.impl.DASImpl.<init>(DASImpl.java:60)
at
org.apache.tuscany.das.rdb.impl.DASFactoryImpl.createDAS(DASFactoryImpl.
java:31)
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