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Posted to user@tuscany.apache.org by Ron Gavlin <rg...@yahoo.com> on 2006/08/31 16:08:04 UTC
Help...NPE at o.a.t.sdo.impl.ClassImpl.getProperty(ClassImpl.java:192) w/multiple threads
Hi,
I receive the following NPE when using Tuscany SDO in a multi-threaded environment. Here is the stack trace:
java.lang.NullPointerException
at org.apache.tuscany.sdo.impl.ClassImpl.getProperty(ClassImpl.java:192)
at org.apache.tuscany.sdo.util.DataObjectUtil.getProperty(DataObjectUtil.java:2342)
at org.apache.tuscany.sdo.util.DataObjectUtil.getProperty(DataObjectUtil.java:1284)
at org.apache.tuscany.sdo.util.DataObjectUtil$Accessor.setFeatureName(DataObjectUtil.java:2032)
at org.apache.tuscany.sdo.util.DataObjectUtil$Accessor.process(DataObjectUtil.java:2139)
at org.apache.tuscany.sdo.util.DataObjectUtil$Accessor.init(DataObjectUtil.java:1918)
at org.apache.tuscany.sdo.util.DataObjectUtil$Accessor.create(DataObjectUtil.java:1838)
at org.apache.tuscany.sdo.util.DataObjectUtil.get(DataObjectUtil.java:739)
at org.apache.tuscany.sdo.util.DataObjectUtil.get(DataObjectUtil.java:213)
...
I suspect the NPE is due to synchronization problems with the ClassImpl.propertyNameToPropertyMap. This problem occurs during load testing of our application. Thanks in advance for your assistance. This is a show-stopper for us.
- Ron
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Re: Help...NPE at o.a.t.sdo.impl.ClassImpl.getProperty(ClassImpl.java:192) w/multiple threads
Posted by Ron Gavlin <rg...@yahoo.com>.
Hi Frank,
I applied your patch and it had no affect.
However, I did discover some interesting info during troubleshooting. The machine we are using to load test is a Wintel dual-core PC running WinXP. This machine gets the NPE with or without your patch.
Just for kicks, I tried running the test on a single-processor Wintel PC running Win2K. This machine DOES NOT get the NPE with or without your patch.
We are using Sun JDK 1.4.2_11 in both environments. Any suggestions where to go from here?
- Ron
----- Original Message ----
From: Ron Gavlin <rg...@yahoo.com>
To: tuscany-user@ws.apache.org
Sent: Thursday, August 31, 2006 10:56:28 AM
Subject: Re: Help...NPE at o.a.t.sdo.impl.ClassImpl.getProperty(ClassImpl.java:192) w/multiple threads
Frank,
I'll try your suggestion and get back to you. FYI, I opened JIRA TUSCANY-682 to track the problem. Thanks for the quick reply.
- Ron
----- Original Message ----
From: Frank Budinsky <fr...@ca.ibm.com>
To: tuscany-user@ws.apache.org
Sent: Thursday, August 31, 2006 10:47:14 AM
Subject: Re: Help...NPE at o.a.t.sdo.impl.ClassImpl.getProperty(ClassImpl.java:192) w/multiple threads
Hi Ron,
Multiple threads eh .... The only way I can see this happing is when
propertyNameToProperyMap is set back to null in getProperty(String). Could
you try changing a couple of ClassImpl methods to the following and see if
it fixes the problem?
private void initAliasNames(boolean force) {
if (propertyNameToPropertyMap == null || force)
{
Map result = new HashMap();
for (Iterator i = getProperties().iterator(); i.hasNext(); )
{
Property property = (Property)i.next();
result.put(property.getName(), property);
List aliasNames = property.getAliasNames();
for (int count = aliasNames.size(); count > 0; )
{
result.put(aliasNames.get(--count), property);
}
}
propertyNameToPropertyMap = result;
}
}
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated NOT
*/
public Property getProperty(String propertyName)
{
initAliasNames(false);
Property property =
(Property)propertyNameToPropertyMap.get(propertyName);
if (property == null && !isOpen()) {
//propertyNameToPropertyMap = null;
initAliasNames(true);
property = (Property)propertyNameToPropertyMap.get(propertyName);
}
return property;
}
Thanks,
Frank.
Ron Gavlin <rg...@yahoo.com> wrote on 08/31/2006 10:08:04 AM:
> Hi,
>
> I receive the following NPE when using Tuscany SDO in a multi-
> threaded environment. Here is the stack trace:
>
> java.lang.NullPointerException
> at org.apache.tuscany.sdo.impl.ClassImpl.getProperty(ClassImpl.java:192)
> at org.apache.tuscany.sdo.util.DataObjectUtil.
> getProperty(DataObjectUtil.java:2342)
> at org.apache.tuscany.sdo.util.DataObjectUtil.
> getProperty(DataObjectUtil.java:1284)
> at org.apache.tuscany.sdo.util.DataObjectUtil$Accessor.
> setFeatureName(DataObjectUtil.java:2032)
> at org.apache.tuscany.sdo.util.DataObjectUtil$Accessor.
> process(DataObjectUtil.java:2139)
> at org.apache.tuscany.sdo.util.DataObjectUtil$Accessor.
> init(DataObjectUtil.java:1918)
> at org.apache.tuscany.sdo.util.DataObjectUtil$Accessor.
> create(DataObjectUtil.java:1838)
> at
org.apache.tuscany.sdo.util.DataObjectUtil.get(DataObjectUtil.java:739)
> at
org.apache.tuscany.sdo.util.DataObjectUtil.get(DataObjectUtil.java:213)
> ...
>
> I suspect the NPE is due to synchronization problems with the
> ClassImpl.propertyNameToPropertyMap. This problem occurs during load
> testing of our application. Thanks in advance for your assistance.
> This is a show-stopper for us.
>
> - Ron
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: tuscany-user-unsubscribe@ws.apache.org
> For additional commands, e-mail: tuscany-user-help@ws.apache.org
>
---------------------------------------------------------------------
To unsubscribe, e-mail: tuscany-user-unsubscribe@ws.apache.org
For additional commands, e-mail: tuscany-user-help@ws.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: tuscany-user-unsubscribe@ws.apache.org
For additional commands, e-mail: tuscany-user-help@ws.apache.org
---------------------------------------------------------------------
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Re: Help...NPE at o.a.t.sdo.impl.ClassImpl.getProperty(ClassImpl.java:192) w/multiple threads
Posted by Ron Gavlin <rg...@yahoo.com>.
Frank,
I'll try your suggestion and get back to you. FYI, I opened JIRA TUSCANY-682 to track the problem. Thanks for the quick reply.
- Ron
----- Original Message ----
From: Frank Budinsky <fr...@ca.ibm.com>
To: tuscany-user@ws.apache.org
Sent: Thursday, August 31, 2006 10:47:14 AM
Subject: Re: Help...NPE at o.a.t.sdo.impl.ClassImpl.getProperty(ClassImpl.java:192) w/multiple threads
Hi Ron,
Multiple threads eh .... The only way I can see this happing is when
propertyNameToProperyMap is set back to null in getProperty(String). Could
you try changing a couple of ClassImpl methods to the following and see if
it fixes the problem?
private void initAliasNames(boolean force) {
if (propertyNameToPropertyMap == null || force)
{
Map result = new HashMap();
for (Iterator i = getProperties().iterator(); i.hasNext(); )
{
Property property = (Property)i.next();
result.put(property.getName(), property);
List aliasNames = property.getAliasNames();
for (int count = aliasNames.size(); count > 0; )
{
result.put(aliasNames.get(--count), property);
}
}
propertyNameToPropertyMap = result;
}
}
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated NOT
*/
public Property getProperty(String propertyName)
{
initAliasNames(false);
Property property =
(Property)propertyNameToPropertyMap.get(propertyName);
if (property == null && !isOpen()) {
//propertyNameToPropertyMap = null;
initAliasNames(true);
property = (Property)propertyNameToPropertyMap.get(propertyName);
}
return property;
}
Thanks,
Frank.
Ron Gavlin <rg...@yahoo.com> wrote on 08/31/2006 10:08:04 AM:
> Hi,
>
> I receive the following NPE when using Tuscany SDO in a multi-
> threaded environment. Here is the stack trace:
>
> java.lang.NullPointerException
> at org.apache.tuscany.sdo.impl.ClassImpl.getProperty(ClassImpl.java:192)
> at org.apache.tuscany.sdo.util.DataObjectUtil.
> getProperty(DataObjectUtil.java:2342)
> at org.apache.tuscany.sdo.util.DataObjectUtil.
> getProperty(DataObjectUtil.java:1284)
> at org.apache.tuscany.sdo.util.DataObjectUtil$Accessor.
> setFeatureName(DataObjectUtil.java:2032)
> at org.apache.tuscany.sdo.util.DataObjectUtil$Accessor.
> process(DataObjectUtil.java:2139)
> at org.apache.tuscany.sdo.util.DataObjectUtil$Accessor.
> init(DataObjectUtil.java:1918)
> at org.apache.tuscany.sdo.util.DataObjectUtil$Accessor.
> create(DataObjectUtil.java:1838)
> at
org.apache.tuscany.sdo.util.DataObjectUtil.get(DataObjectUtil.java:739)
> at
org.apache.tuscany.sdo.util.DataObjectUtil.get(DataObjectUtil.java:213)
> ...
>
> I suspect the NPE is due to synchronization problems with the
> ClassImpl.propertyNameToPropertyMap. This problem occurs during load
> testing of our application. Thanks in advance for your assistance.
> This is a show-stopper for us.
>
> - Ron
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: tuscany-user-unsubscribe@ws.apache.org
> For additional commands, e-mail: tuscany-user-help@ws.apache.org
>
---------------------------------------------------------------------
To unsubscribe, e-mail: tuscany-user-unsubscribe@ws.apache.org
For additional commands, e-mail: tuscany-user-help@ws.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: tuscany-user-unsubscribe@ws.apache.org
For additional commands, e-mail: tuscany-user-help@ws.apache.org
Re: Help...NPE at o.a.t.sdo.impl.ClassImpl.getProperty(ClassImpl.java:192) w/multiple
threads
Posted by Frank Budinsky <fr...@ca.ibm.com>.
Hi Ron,
Multiple threads eh .... The only way I can see this happing is when
propertyNameToProperyMap is set back to null in getProperty(String). Could
you try changing a couple of ClassImpl methods to the following and see if
it fixes the problem?
private void initAliasNames(boolean force) {
if (propertyNameToPropertyMap == null || force)
{
Map result = new HashMap();
for (Iterator i = getProperties().iterator(); i.hasNext(); )
{
Property property = (Property)i.next();
result.put(property.getName(), property);
List aliasNames = property.getAliasNames();
for (int count = aliasNames.size(); count > 0; )
{
result.put(aliasNames.get(--count), property);
}
}
propertyNameToPropertyMap = result;
}
}
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated NOT
*/
public Property getProperty(String propertyName)
{
initAliasNames(false);
Property property =
(Property)propertyNameToPropertyMap.get(propertyName);
if (property == null && !isOpen()) {
//propertyNameToPropertyMap = null;
initAliasNames(true);
property = (Property)propertyNameToPropertyMap.get(propertyName);
}
return property;
}
Thanks,
Frank.
Ron Gavlin <rg...@yahoo.com> wrote on 08/31/2006 10:08:04 AM:
> Hi,
>
> I receive the following NPE when using Tuscany SDO in a multi-
> threaded environment. Here is the stack trace:
>
> java.lang.NullPointerException
> at org.apache.tuscany.sdo.impl.ClassImpl.getProperty(ClassImpl.java:192)
> at org.apache.tuscany.sdo.util.DataObjectUtil.
> getProperty(DataObjectUtil.java:2342)
> at org.apache.tuscany.sdo.util.DataObjectUtil.
> getProperty(DataObjectUtil.java:1284)
> at org.apache.tuscany.sdo.util.DataObjectUtil$Accessor.
> setFeatureName(DataObjectUtil.java:2032)
> at org.apache.tuscany.sdo.util.DataObjectUtil$Accessor.
> process(DataObjectUtil.java:2139)
> at org.apache.tuscany.sdo.util.DataObjectUtil$Accessor.
> init(DataObjectUtil.java:1918)
> at org.apache.tuscany.sdo.util.DataObjectUtil$Accessor.
> create(DataObjectUtil.java:1838)
> at
org.apache.tuscany.sdo.util.DataObjectUtil.get(DataObjectUtil.java:739)
> at
org.apache.tuscany.sdo.util.DataObjectUtil.get(DataObjectUtil.java:213)
> ...
>
> I suspect the NPE is due to synchronization problems with the
> ClassImpl.propertyNameToPropertyMap. This problem occurs during load
> testing of our application. Thanks in advance for your assistance.
> This is a show-stopper for us.
>
> - Ron
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: tuscany-user-unsubscribe@ws.apache.org
> For additional commands, e-mail: tuscany-user-help@ws.apache.org
>
---------------------------------------------------------------------
To unsubscribe, e-mail: tuscany-user-unsubscribe@ws.apache.org
For additional commands, e-mail: tuscany-user-help@ws.apache.org