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When deleting a high volume of process instances using the workflow management API, the K2HostServer will show a huge increase in Windows handle usage (visible in Task Manager). This scenario will manifest itself until the server eventually terminates, sometimes producing an “Out of memory” exception.
|Note:||This error scenario describes one set of circumstances under which this error is known to occur, and does not include all scenarios.|
The code sample provided below can be used to start delete a high volume of process instances. Despite the code explicitly closing and disposing the Management Server Connection, the handle count increases.
|Note:||This code may cause your K2 Server to stop responding and may require a restart. Caution must be exercised if this code is tested on production systems.|
WFM.WorkflowManagementServer wms = new WFM.WorkflowManagementServer("localhost",
WFM.ProcessSets procset = wms.GetProcSets();
int procid = 0;
foreach (WFM.ProcessSet procs in procset)
if (procs.FullName.ToString() == "ClientProcess\\Process1")
procid = procs.ProcID;
WFM.ProcessInstances pi = wms.GetProcessInstances(procid);
foreach (WFM.ProcessInstance var in pi)
This Hotfix is contained within the latest K2 blackpearl Update. Install the update package to resolve the error.
|Note:||Once the hotfix has been installed, the K2 blackpearl Service instance and or an IIS Reset may be required.|
The latest K2 blackpearl Update is available as an independent installation package which can be found here: http://portal.k2.com/downloads/bp/Default.aspx