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Exception in completeTask

satramalin

Hi,
Can you please let me know when this exception happens
Exception Occured in completeTask(): HistoricVariableInstanceEntity[id=1907296, name=request, revision=1, type=serializable, byteArrayValueId=1907297] was updated by another transaction concurrently
Thanks!!

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Comments

trademak

I would expect that the same variable is changed by multiple transactions at the same time. Would that be possible in your implementation?

Best regards,

satramalin

We don't have that scenario in our implementation. Its a simple test process which has 3 user tasks assigned to the same user. We are checking the load by creating large number of instances in a high speed. When the load increases, we observed this exception. We also observed the below exceptions.

1. Exception Occured in completeTask():"Exception Occured in completeTask():
### Error updating database. Cause: java.sql.SQLException: ORA-00060: deadlock detected while waiting for resource
### The error may involve org.activiti.engine.impl.persistence.entity.HistoricActivityInstanceEntity.updateHistoricActivityInstance-Inline
### The error occurred while setting parameters
### SQL: update ACT_HI_ACTINST set EXECUTION_ID_ = ?, ASSIGNEE_ = ?, END_TIME_ = ?, DURATION_ = ? where ID_ = ?
### Cause: java.sql.SQLException: ORA-00060: deadlock detected while waiting for resource

2. Exception Occured in completeTask(): Cannot find task with id

Thanks

jbarrez

A deadlock is surely something else than the optimisticlocking exception.

What are you testing here exactly? How many instances? What kind of Oracle database?

satramalin

We are performing a load test on Oracle exadata. There are 3500-4000 instances created for a single run. Right now, there are more than 100000 instances in the database. Out of close to 3500 instances in every run, we observed the exceptions for 10-15 instances. Most of the exceptions are with concurrent updates.

Thanks

satramalin

Please find the attached bpmn

packmerchandise-subprocess.txt.zip

orderprocess.txt.zip

hepcibha

Hi, we are having a similar issue in production, did you find a solution for this?

jbarrez

You mean a deadlock? We would need more info about the process and how to reproduce.