NPE in ERXObjectStoreCoordinatorSynchronizer

2016-10-18 Thread Paul Hoadley 
Hello,

I seem to be starting a number of posts in this way, but… I’m seeing very 
occasional stack traces from the wild that look like this:

Oct 17 23:10:57 Relief[2002] ERROR 
er.extensions.eof.ERXObjectStoreCoordinatorSynchronizer  - 
java.lang.NullPointerException
NullPointerException
  at 
com.webobjects.eocontrol.EOCustomObject.willReadRelationship(EOCustomObject.java:1270)
  at 
er.extensions.eof.ERXGenericRecord.willReadRelationship(ERXGenericRecord.java:385)
  at 
com.webobjects.eocontrol._EOMutableKnownKeyDictionary$Initializer$_LazyGenericRecordBinding.valueInObject(_EOMutableKnownKeyDictionary.java:614)
  at 
er.extensions.eof.ERXGenericRecord$TouchingBinding.valueInObject(ERXGenericRecord.java:214)
  at 
com.webobjects.eocontrol.EOCustomObject.storedValueForKey(EOCustomObject.java:1634)
  at net.logicsquad.relief.model._Job.classTeacher(_Job.java:192)
 ... skipped 6 stack elements
  at 
er.extensions.eof.ERXGenericRecord$InverseRelationshipUpdater.includeObjectIntoPropertyWithKey(ERXGenericRecord.java:1367)
  at 
er.extensions.eof.ERXGenericRecord.includeObjectIntoPropertyWithKey(ERXGenericRecord.java:1225)
  at net.logicsquad.relief.model._ClassTeacher.addToJobs(_ClassTeacher.java:212)
 ... skipped 5 stack elements
  at 
com.webobjects.eocontrol.EOCustomObject.addObjectToPropertyWithKey(EOCustomObject.java:940)
  at 
com.webobjects.eocontrol.EOEditingContext._mergeValueForKey(EOEditingContext.java:660)
  at 
com.webobjects.eocontrol.EOEditingContext._mergeObjectWithChanges(EOEditingContext.java:3457)
  at 
com.webobjects.eocontrol.EOEditingContext._processObjectStoreChanges(EOEditingContext.java:3546)
  at er.extensions.eof.ERXEC._processObjectStoreChanges(ERXEC.java:1549)
 ... skipped 5 stack elements
  at 
com.webobjects.eocontrol.EOEditingContext._sendOrEnqueueNotification(EOEditingContext.java:4715)
  at 
com.webobjects.eocontrol.EOEditingContext._objectsChangedInStore(EOEditingContext.java:3562)
  at er.extensions.eof.ERXEC._objectsChangedInStore(ERXEC.java:1489)
 ... skipped 7 stack elements
  at 
com.webobjects.eocontrol.EOObjectStoreCoordinator._objectsChangedInSubStore(EOObjectStoreCoordinator.java:693)
 ... skipped 7 stack elements
  at 
er.extensions.eof.ERXObjectStoreCoordinatorSynchronizer$ProcessChangesQueue$ToManyUpdateCacheChangeProcessor.processCacheChange(ERXObjectStoreCoordinatorSynchronizer.java:466)
  at 
er.extensions.eof.ERXObjectStoreCoordinatorSynchronizer$ProcessChangesQueue.processRemoteChange(ERXObjectStoreCoordinatorSynchronizer.java:566)
  at 
er.extensions.eof.ERXObjectStoreCoordinatorSynchronizer$ProcessChangesQueue.run(ERXObjectStoreCoordinatorSynchronizer.java:622)
  ... skipped 1 stack elements

We’re running an app here using ERJGroupsSynchronizer, (very) slightly modified 
to work in an AWS EC2 environment. The app sees what you’d have to describe as 
a low level of concurrency. What I assume I’m seeing above is an instance 
processing an incoming change notification, and hitting an NPE. This is 
EOCustomObject at 1270:

ec.lockObjectStore();

So some EC has presumably turned to null. What happens next is that that 
instance seems to see (or at least process) no further change notifications, 
and its view of the database gets stale in the usual way.

Does anyone want to take a guess at this one?


-- 
Paul Hoadley
http://logicsquad.net/



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Re: Best charting?

2016-10-18 Thread Paul Hoadley 
Hi Ken,

On 19 Oct 2016, at 6:07 AM, Ken Anderson  wrote:

> I have some data that I’d like to be able to make HTML 5 charts from.  Are 
> there any decent tools for doing this with WO?

We’ve used Highcharts in a few projects:

http://www.highcharts.com/ 


-- 
Paul Hoadley
http://logicsquad.net/



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Re: Best charting?

2016-10-18 Thread Steve Peery 
I have also used jFreeChart.  

If you want to try it, see ERPChart and its subclasses in Wonder.

https://jenkins.wocommunity.org/job/WonderIntegration/lastBuild/javadoc/er/plot/ERPChart.html

Wonder makes it easy!

Steve

> On Oct 18, 2016, at 3:43 PM, Morris, Mark  wrote:
> 
> Hi Ken,
> 
> A few years ago I used jFreeChart, which was very easy to integrate. it has 
> factory methods for each type of chart that you throw your data at, lots of 
> customization options, and a variety of output formats. So for instance you 
> can just include a method that returns the image data and use that right in 
> your WOImage binding.
> 
> Good luck!
> Mark
> 
>> On Oct 18, 2016, at 2:37 PM, Ken Anderson  wrote:
>> 
>> All,
>> 
>> I have some data that I’d like to be able to make HTML 5 charts from.  Are 
>> there any decent tools for doing this with WO?
>> 
>> Thanks!
>> Ken
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> 
> 
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Re: Best charting?

2016-10-18 Thread Morris, Mark 
Hi Ken,

A few years ago I used jFreeChart, which was very easy to integrate. it has 
factory methods for each type of chart that you throw your data at, lots of 
customization options, and a variety of output formats. So for instance you can 
just include a method that returns the image data and use that right in your 
WOImage binding.

Good luck!
Mark

> On Oct 18, 2016, at 2:37 PM, Ken Anderson  wrote:
> 
> All,
> 
> I have some data that I’d like to be able to make HTML 5 charts from.  Are 
> there any decent tools for doing this with WO?
> 
> Thanks!
> Ken
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Best charting?

2016-10-18 Thread Ken Anderson 
All,

I have some data that I’d like to be able to make HTML 5 charts from.  Are 
there any decent tools for doing this with WO?

Thanks!
Ken
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