Nullpointer exception on variable read event
--------------------------------------------
Key: ODE-508
URL: https://issues.apache.org/jira/browse/ODE-508
Project: ODE
Issue Type: Bug
Components: BPEL Runtime
Affects Versions: 1.3
Environment: Ode trunk somewhat prior to revision 741158 deployed in
tomcat 6.0.14 as a web app.
Reporter: Douglas Scott Jackson
Priority: Critical
In an if condition the access of a variable throws a null pointer exception as
follows:
<variable name="i-unsuccessful" type="xsd:boolean" />
<variable name="m-unsuccessful" type="xsd:boolean" />
...
<if name="If__m_and_i_successful">
<condition>($m-unsuccessful or $i-unsuccessful) = false</condition>
LineNo = 2530
Class = class org.apache.ode.bpel.evt.ActivityEnabledEvent
DEBUG - GeronimoLog.debug(66) |
ActivityExecStartEvent:
Type = activityLifecycle
ActivityId = 197
ActivityName = If__m_and_i_successful
ActivityType = OSwitch
ActivityDeclarationId = 1771
ScopeId = 28269
ScopeDeclarationId = 3
ScopeName = __PROCESS_SCOPE:dtran
ParentScopesNames = [__PROCESS_SCOPE:dtran]
ProcessInstanceId = 28202
ProcessId = {http://xxx/yyy}dtran-64
ProcessName = {http://xxx/yyy}dtran
Timestamp = Thu Feb 05 13:21:49 CST 2009
LineNo = 2530
Class = class org.apache.ode.bpel.evt.ActivityExecStartEvent
DEBUG - GeronimoLog.debug(66) | Resolving variable m-unsuccessful
DEBUG - GeronimoLog.debug(66) |
VariableReadEvent:
Type = dataHandling
VarName = m-unsuccessful
ScopeId = 28269
ScopeDeclarationId = 3
ScopeName = __PROCESS_SCOPE:dtran
ParentScopesNames = [__PROCESS_SCOPE:dtran]
ProcessInstanceId = 28202
ProcessId = {http://xxx/yyy}dtran-64
ProcessName = {http://xxx/yyy}dtran
Timestamp = Thu Feb 05 13:21:49 CST 2009
LineNo = 30
Class = class org.apache.ode.bpel.evt.VariableReadEvent
DEBUG - GeronimoLog.debug(66) | Resolving variable i-unsuccessful
DEBUG - GeronimoLog.debug(70) | Could not evaluate expression because of
java.lang.NullPointerException
at
org.apache.ode.bpel.rtrep.v2.ExprEvaluationContextImpl.readVariable(ExprEvaluationContextImpl.java:74)
at
org.apache.ode.bpel.rtrep.v2.xpath20.JaxpVariableResolver.resolveVariable(JaxpVariableResolver.java:97)
at
net.sf.saxon.xpath.JAXPVariable.evaluateVariable(JAXPVariable.java:110)
at
net.sf.saxon.expr.VariableReference.evaluateVariable(VariableReference.java:480)
at
net.sf.saxon.expr.VariableReference.iterate(VariableReference.java:433)
at
net.sf.saxon.expr.Expression.effectiveBooleanValue(Expression.java:421)
at
net.sf.saxon.expr.BooleanExpression.effectiveBooleanValue(BooleanExpression.java:185)
at
net.sf.saxon.expr.BooleanExpression.evaluateItem(BooleanExpression.java:172)
at net.sf.saxon.expr.Expression.iterate(Expression.java:370)
at
net.sf.saxon.expr.GeneralComparison.effectiveBooleanValue(GeneralComparison.java:511)
at
net.sf.saxon.xpath.XPathExpressionImpl.evaluate(XPathExpressionImpl.java:310)
at
org.apache.ode.bpel.rtrep.v2.xpath20.XPath20ExpressionRuntime.evaluate(XPath20ExpressionRuntime.java:236)
at
org.apache.ode.bpel.rtrep.v2.xpath20.XPath20ExpressionRuntime.evaluateAsBoolean(XPath20ExpressionRuntime.java:87)
at
org.apache.ode.bpel.rtrep.v2.ExpressionLanguageRuntimeRegistry.evaluateAsBoolean(ExpressionLanguageRuntimeRegistry.java:71)
at org.apache.ode.bpel.rtrep.v2.SWITCH.run(SWITCH.java:50)
at sun.reflect.GeneratedMethodAccessor38.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at
org.apache.ode.jacob.vpu.JacobVPU$JacobThreadImpl.run(JacobVPU.java:451)
at org.apache.ode.jacob.vpu.JacobVPU.execute(JacobVPU.java:139)
at
org.apache.ode.bpel.rtrep.v2.RuntimeInstanceImpl.execute(RuntimeInstanceImpl.java:639)
at
org.apache.ode.bpel.engine.BpelRuntimeContextImpl.execute(BpelRuntimeContextImpl.java:593)
at
org.apache.ode.bpel.engine.ODEProcess.executeContinueInstancePartnerRoleResponseReceived(ODEProcess.java:473)
at
org.apache.ode.bpel.engine.PartnerLinkPartnerRoleImpl$UnreliableInvoker$2.run(PartnerLinkPartnerRoleImpl.java:395)
at org.apache.ode.bpel.engine.Contexts$1.call(Contexts.java:86)
at org.apache.ode.bpel.engine.Contexts$1.call(Contexts.java:85)
at
org.apache.ode.bpel.engine.Contexts.execTransaction(Contexts.java:106)
at org.apache.ode.bpel.engine.Contexts.execTransaction(Contexts.java:83)
at
org.apache.ode.bpel.engine.BpelServerImpl$TransactedRunnable.run(BpelServerImpl.java:981)
at
org.apache.ode.bpel.engine.BpelInstanceWorker$2.call(BpelInstanceWorker.java:143)
at
org.apache.ode.bpel.engine.BpelInstanceWorker$2.call(BpelInstanceWorker.java:142)
at
org.apache.ode.bpel.engine.BpelInstanceWorker.doInstanceWork(BpelInstanceWorker.java:174)
at
org.apache.ode.bpel.engine.BpelInstanceWorker.run(BpelInstanceWorker.java:141)
at
org.apache.ode.bpel.engine.ODEProcess$ProcessRunnable.run(ODEProcess.java:1158)
at
org.apache.ode.bpel.engine.BpelServerImpl$ServerRunnable.run(BpelServerImpl.java:923)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown
Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
ERROR - GeronimoLog.error(108) |
{http://docs.oasis-open.org/wsbpel/2.0/process/executable}subLanguageExecutionFault:
null
org.apache.ode.bpel.common.FaultException:
{http://docs.oasis-open.org/wsbpel/2.0/process/executable}subLanguageExecutionFault:
null
==============================================
Immediately prior to that a debug statement worked fine:
LineNo = 2523
Class = class org.apache.ode.bpel.evt.ActivityExecStartEvent
DEBUG - GeronimoLog.debug(66) | Assign.copy({OCopy {OXPath10Expression
$debug-output}={OXPath10Expression
dbg:debugString(concat(xsd:string($m-unsuccessful), ' & ',
xsd:string($i-unsuccessful)), 'm-unsuccessful & i-unsuccessful')}})
DEBUG - GeronimoLog.debug(66) | Evaluating FROM expression "{OXPath10Expression
dbg:debugString(concat(xsd:string($m-unsuccessful), ' & ',
xsd:string($i-unsuccessful)), 'm-unsuccessful & i-unsuccessful')}".
DEBUG - GeronimoLog.debug(66) | Resolving variable m-unsuccessful
DEBUG - GeronimoLog.debug(66) |
VariableReadEvent:
Type = dataHandling
VarName = m-unsuccessful
ScopeId = 28269
ScopeDeclarationId = 3
ScopeName = __PROCESS_SCOPE:dtran
ParentScopesNames = [__PROCESS_SCOPE:dtran]
ProcessInstanceId = 28202
ProcessId = {http://xxx/yyy}dtran-64
ProcessName = {http://xxx/yyy}dtran
Timestamp = Thu Feb 05 13:21:49 CST 2009
LineNo = 30
Class = class org.apache.ode.bpel.evt.VariableReadEvent
DEBUG - GeronimoLog.debug(66) | Resolving variable i-unsuccessful
DEBUG - GeronimoLog.debug(66) |
VariableReadEvent:
Type = dataHandling
VarName = i-unsuccessful
ScopeId = 28269
ScopeDeclarationId = 3
ScopeName = __PROCESS_SCOPE:dtran
ParentScopesNames = [__PROCESS_SCOPE:dtran]
ProcessInstanceId = 28202
ProcessId = {http://xxx/yyy}dtran-64
ProcessName = {http://xxx/yyy}dtran
Timestamp = Thu Feb 05 13:21:49 CST 2009
LineNo = 30
Class = class org.apache.ode.bpel.evt.VariableReadEvent
m-unsuccessful & i-unsuccessful -> false & false
DEBUG - GeronimoLog.debug(66) | Expression {OXPath10Expression
dbg:debugString(concat(xsd:string($m-unsuccessful), ' & ',
xsd:string($i-unsuccessful)), 'm-unsuccessful & i-unsuccessful')} generated
result false & false - type=java.lang.String
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