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Bug Report
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Resolution: Unresolved
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L3 - Default
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None
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7.16.0, 7.17.0, 7.15.0
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None
Environment (Required on creation):
- Camunda Platform CE 7.15.0 ( spring boot )
- linux / windows / docker, does not matter
Description (Required on creation; please attach any relevant screenshots, stacktraces, log files, etc. to the ticket):
When creating a global filter which filter for by criteria ( canditate groups / ${currentUserGroups()} )
and the filter is permitted for everyone, a user who has logged in just having permission to tasklist but not assigned to any group, get a 500 error on accessing this filter
Steps to reproduce (Required on creation):
- Create a user with tasklist permission
- Create a filter with criteria ( Candidate Groups / ${currentUserGroups()} )
- Assign the filter to all users
- Login with new user and open the filter
Observed Behavior (Required on creation):
ERROR: response code 500 responded and shown in Tasklist.
The following error is shown in the logs:
org.camunda.bpm.engine.ProcessEngineException: Unable to invoke method 'taskCandidateGroupIn' on class 'org.camunda.bpm.engine.impl.TaskQueryImpl' at org.camunda.bpm.engine.impl.AbstractQuery.evaluateExpressions(AbstractQuery.java:292) ~[camunda-engine-7.15.0.jar:7.15.0] at org.camunda.bpm.engine.impl.AbstractQuery.evaluateExpressionsAndExecuteList(AbstractQuery.java:218) ~[camunda-engine-7.15.0.jar:7.15.0] at org.camunda.bpm.engine.impl.AbstractQuery.executeResult(AbstractQuery.java:168) ~[camunda-engine-7.15.0.jar:7.15.0] at org.camunda.bpm.engine.impl.AbstractQuery.listPage(AbstractQuery.java:150) ~[camunda-engine-7.15.0.jar:7.15.0] at org.camunda.bpm.engine.impl.cmd.ExecuteFilterListPageCmd.execute(ExecuteFilterListPageCmd.java:51) ~[camunda-engine-7.15.0.jar:7.15.0] at org.camunda.bpm.engine.impl.cmd.ExecuteFilterListPageCmd.execute(ExecuteFilterListPageCmd.java:29) ~[camunda-engine-7.15.0.jar:7.15.0] at org.camunda.bpm.engine.impl.interceptor.CommandExecutorImpl.execute(CommandExecutorImpl.java:28) ~[camunda-engine-7.15.0.jar:7.15.0] ... Caused by: java.lang.reflect.InvocationTargetException: null at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na] at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na] at org.camunda.bpm.engine.impl.AbstractQuery.evaluateExpressions(AbstractQuery.java:290) ~[camunda-engine-7.15.0.jar:7.15.0] ... 151 common frames omitted Caused by: org.camunda.bpm.engine.ProcessEngineException: Candidate group list is empty at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:na] at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:na] at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490) ~[na:na] at org.camunda.bpm.engine.impl.util.EnsureUtil.generateException(EnsureUtil.java:394) ~[camunda-engine-7.15.0.jar:7.15.0] at org.camunda.bpm.engine.impl.util.EnsureUtil.ensureNotEmpty(EnsureUtil.java:126) ~[camunda-engine-7.15.0.jar:7.15.0] at org.camunda.bpm.engine.impl.util.EnsureUtil.ensureNotEmpty(EnsureUtil.java:119) ~[camunda-engine-7.15.0.jar:7.15.0] at org.camunda.bpm.engine.impl.util.EnsureUtil.ensureNotEmpty(EnsureUtil.java:109) ~[camunda-engine-7.15.0.jar:7.15.0] at org.camunda.bpm.engine.impl.TaskQueryImpl.taskCandidateGroupIn(TaskQueryImpl.java:465) ~[camunda-engine-7.15.0.jar:7.15.0] ... 156 common frames omitted
Expected behavior (Required on creation):
No error, just no entries like for other filters.
Root Cause (Required on prioritization):
There is a ensureNotEmpty validation in the org.camunda.bpm.engine.impl.TaskQueryImpl#taskCandidateGroupIn method (ref). When there are no candidate groups, the ensureNotEmpty validation asserts to false and throws an exception.
Solution Ideas (Optional):
- Remove the ensureNotEmpty validation since it is only present for the TaskQueryImpl#taskCandidateGroupIn method.
- Adjust the task mapping to ensure we are not joining the identity table when the list is empty
- Add a new API for tasklist filters regarding TaskQueryImpl#taskCandidateGroupIn that would allow for empty lists.
This is the controller panel for Smart Panels app
[CAM-14388] Server error on filtering by user groups
Hi schaefer,
thanks for bringing this up.
While we agree that this behavior is not ideal and consider this a bug, we also consider this a rather low priority use case.
Thus, we will not fix this in the near future due to other priorities.
That being said, we believe fixing this is also not too complex when looking at the solution ideas.
If this is important to you, we are happy to provide pointers on how to fix this so you can contribute via a pull request.
Best,
Tobias
This ticket was migrated to github: https://github.com/camunda/camunda-bpm-platform/issues/2702. Please use this link for any future references and continue any discussion there.
Hi schaefer,
Thank you for reporting this. I successfully reproduced the bug and I will forward it for scheduling.
Best,
Nikola