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TMM leaks memory in the 'tcl' subsystem. This can be observed, for example, by monitoring the output of the 'tmsh show sys memory' command over time.
As TMM memory utilization grows, TMM will first attempt to free up memory by removing idle flows. As a result, you may experience flows are expired before their configured idle timeout. Ultimately, TMM can crash if it is unable to allocate memory. Traffic will be disrupted while TMM restarts.
Currently, the only known circumstance is when all of the following conditions apply: - You have a standard UDP virtual server. - You have an iRule calling the 'persist' command under 'CLIENT_DATA'. - Load balancing of the UDP flow fails as the assigned pool has no available members.
Within the context of the known circumstance, you can work around this issue by moving the 'persist' command to the 'CLIENT_ACCEPTED' event.
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