Use of profile picture command leads to NullPointerException

[shess]

Hi everybody, 

I am facing a strange NullPointerException, when I programmatically save a profile picture for a user.

My add-on uses the UserProfileService of Confluence:

newSetProfilePictureCommand(User paramUser, InputStream paramInputStream, String paramString);

Then the following NPE occurs: 

[INFO] [talledLocalContainer] 2015-11-23 13:43:38,157 ERROR [com.atlassian.confluence.notifications.impl.DefaultDispatchService:thread-4] [confluence.notifications.impl.DefaultDispatchService] errorOrDebug Error computing recipients
[INFO] [talledLocalContainer] java.lang.NullPointerException
[INFO] [talledLocalContainer] 	at com.atlassian.confluence.plugins.files.notifications.email.FileContentRecipientProvider$1.apply(FileContentRecipientProvider.java:31)
[INFO] [talledLocalContainer] 	at com.atlassian.confluence.plugins.files.notifications.email.FileContentRecipientProvider$1.apply(FileContentRecipientProvider.java:27)
[INFO] [talledLocalContainer] 	at com.google.common.collect.Iterators$8.next(Iterators.java:812)
[INFO] [talledLocalContainer] 	at com.google.common.collect.Iterators$5.next(Iterators.java:554)
[INFO] [talledLocalContainer] 	at com.google.common.collect.Iterators$5.next(Iterators.java:554)
[INFO] [talledLocalContainer] 	at com.google.common.collect.Iterators$7.computeNext(Iterators.java:648)
[INFO] [talledLocalContainer] 	at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:143)
[INFO] [talledLocalContainer] 	at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:138)
[INFO] [talledLocalContainer] 	at com.google.common.collect.Lists.newArrayList(Lists.java:138)
[INFO] [talledLocalContainer] 	at com.google.common.collect.Iterables.toCollection(Iterables.java:315)
[INFO] [talledLocalContainer] 	at com.google.common.collect.Iterables.toArray(Iterables.java:306)
[INFO] [talledLocalContainer] 	at com.google.common.collect.SortedIterables.sortedUnique(SortedIterables.java:93)
[INFO] [talledLocalContainer] 	at com.google.common.collect.ImmutableSortedSet.copyOfInternal(ImmutableSortedSet.java:417)
[INFO] [talledLocalContainer] 	at com.google.common.collect.ImmutableSortedSet.copyOf(ImmutableSortedSet.java:352)
[INFO] [talledLocalContainer] 	at com.atlassian.confluence.notifications.impl.DefaultDispatchService.compileDistinctRecipients(DefaultDispatchService.java:251)
[INFO] [talledLocalContainer] 	at com.atlassian.confluence.notifications.impl.DefaultDispatchService.access$100(DefaultDispatchService.java:43)
[INFO] [talledLocalContainer] 	at com.atlassian.confluence.notifications.impl.DefaultDispatchService$1.call(DefaultDispatchService.java:89)
[INFO] [talledLocalContainer] 	at com.atlassian.confluence.notifications.impl.DefaultDispatchService$1.call(DefaultDispatchService.java:86)
[INFO] [talledLocalContainer] 	at com.atlassian.confluence.notifications.impl.DefaultDispatchService$6$1$1.doInTransaction(DefaultDispatchService.java:170)
[INFO] [talledLocalContainer] 	at com.atlassian.confluence.notifications.impl.DefaultDispatchService$6$1$1.doInTransaction(DefaultDispatchService.java:166)
[INFO] [talledLocalContainer] 	at com.atlassian.sal.core.transaction.HostContextTransactionTemplate$1.doInTransaction(HostContextTransactionTemplate.java:25)
[INFO] [talledLocalContainer] 	at com.atlassian.sal.spring.component.SpringHostContextAccessor$1.doInTransaction(SpringHostContextAccessor.java:88)
[INFO] [talledLocalContainer] 	at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:128)
[INFO] [talledLocalContainer] 	at com.atlassian.sal.spring.component.SpringHostContextAccessor.doInTransaction(SpringHostContextAccessor.java:82)
[INFO] [talledLocalContainer] 	at sun.reflect.GeneratedMethodAccessor180.invoke(Unknown Source)
[INFO] [talledLocalContainer] 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[INFO] [talledLocalContainer] 	at java.lang.reflect.Method.invoke(Method.java:483)
[INFO] [talledLocalContainer] 	at com.atlassian.plugin.osgi.hostcomponents.impl.DefaultComponentRegistrar$ContextClassLoaderSettingInvocationHandler.invoke(DefaultComponentRegistrar.java:117)
[INFO] [talledLocalContainer] 	at com.sun.proxy.$Proxy221.doInTransaction(Unknown Source)
[INFO] [talledLocalContainer] 	at sun.reflect.GeneratedMethodAccessor180.invoke(Unknown Source)
[INFO] [talledLocalContainer] 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[INFO] [talledLocalContainer] 	at java.lang.reflect.Method.invoke(Method.java:483)
[INFO] [talledLocalContainer] 	at com.atlassian.plugin.osgi.bridge.external.HostComponentFactoryBean$DynamicServiceInvocationHandler.invoke(HostComponentFactoryBean.java:130)
[INFO] [talledLocalContainer] 	at com.sun.proxy.$Proxy221.doInTransaction(Unknown Source)
[INFO] [talledLocalContainer] 	at com.atlassian.sal.core.transaction.HostContextTransactionTemplate.execute(HostContextTransactionTemplate.java:21)
[INFO] [talledLocalContainer] 	at sun.reflect.GeneratedMethodAccessor191.invoke(Unknown Source)
[INFO] [talledLocalContainer] 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[INFO] [talledLocalContainer] 	at java.lang.reflect.Method.invoke(Method.java:483)
[INFO] [talledLocalContainer] 	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:307)
[INFO] [talledLocalContainer] 	at org.springframework.osgi.service.importer.support.internal.aop.ServiceInvoker.doInvoke(ServiceInvoker.java:58)
[INFO] [talledLocalContainer] 	at org.springframework.osgi.service.importer.support.internal.aop.ServiceInvoker.invoke(ServiceInvoker.java:62)
[INFO] [talledLocalContainer] 	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
[INFO] [talledLocalContainer] 	at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
[INFO] [talledLocalContainer] 	at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
[INFO] [talledLocalContainer] 	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
[INFO] [talledLocalContainer] 	at org.springframework.osgi.service.util.internal.aop.ServiceTCCLInterceptor.invokeUnprivileged(ServiceTCCLInterceptor.java:56)
[INFO] [talledLocalContainer] 	at org.springframework.osgi.service.util.internal.aop.ServiceTCCLInterceptor.invoke(ServiceTCCLInterceptor.java:39)
[INFO] [talledLocalContainer] 	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
[INFO] [talledLocalContainer] 	at org.springframework.osgi.service.importer.support.LocalBundleContextAdvice.invoke(LocalBundleContextAdvice.java:59)
[INFO] [talledLocalContainer] 	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
[INFO] [talledLocalContainer] 	at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
[INFO] [talledLocalContainer] 	at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
[INFO] [talledLocalContainer] 	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
[INFO] [talledLocalContainer] 	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
[INFO] [talledLocalContainer] 	at com.sun.proxy.$Proxy1765.execute(Unknown Source)
[INFO] [talledLocalContainer] 	at com.atlassian.confluence.notifications.impl.DefaultDispatchService$6$1.run(DefaultDispatchService.java:165)
[INFO] [talledLocalContainer] 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[INFO] [talledLocalContainer] 	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
[INFO] [talledLocalContainer] 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
[INFO] [talledLocalContainer] 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
[INFO] [talledLocalContainer] 	at java.lang.Thread.run(Thread.java:745)
[INFO] [talledLocalContainer] 2015-11-23 13:43:38,157 WARN [com.atlassian.confluence.notifications.impl.DefaultDispatchService:thread-5] [confluence.notifications.impl.DefaultDispatchService] warnOrDebug No recipients were compiled for notification [com.atlassian.confluence.notifications.impl.DescriptorBasedNotificationFactory$PayloadBasedNotification@71671635[key=com.atlassian.confluence.plugins.confluence-file-notifications:file-content-update-notification,payload=com.atlassian.confluence.plugins.files.notifications.email.FileContentUpdatePayload@33e07dc,id=c29bf5cb-8a72-43f9-856e-608c67d110c7,originator=ff8081814bc07a12014bc088434b010b]] from the following list of providers [{com.atlassian.confluence.plugins.files.notifications.email.FileContentRecipientProvider@4eabbdfa}], thus aborting dispatch.

Any suggestions how to avoid this exception? And why it occurs?

Thanks in advance
Sven

[Robert Krause]

Hi Sven,

apparently the only way to fix this is by bypassing the UserAccessor and implementing the methods yourself, without triggering the event, that causes the exception.

Best regards,
Robert