3539482 - Server stops/hangs with message "trying get forbid mutex held by task"

IQ server becomes unresponsive intermittently with following message in .srvlog/.stderr. logs:

• Task 0x1dd4bf0(Request task xxx) is trying get forbid mutex held by task xxxxxxx(Request task xxx) for more than xxxxxx ms
• Task xxxxxxx(Request task xxx) state: OS thread id=xxxxxxxx
• System crashes after launching the query and no functions in UI (User Interface) can be used to cancel query.
• The SQL query, which has 35 nested "JOINs" and "GROUP BYs" and is growing exponentially, is responsible for infinite runtimes.

SAP IQ 16.1 SP05

hang, deadlock, hangup, "hang up", hung, CR828894, CR#828894, 828894, "forbid mutex", CR829015, CR#829015 , 829015 , KBA , BC-SYB-IQ , Sybase IQ , BW-SYS-DB-IQ , BW on HANA with Sybase IQ Near-line Storage , Known Error