Details
Critical Description
KahaDB store limit can be exceeded with durable subscribers.
AMQ with store limit set, we can observe that the usage continues to increase AFTER PFC is engaged. Given time, this growth stabilizes. The issue of having exceeded the store limit remains.
See below output from KahaDB dump in attachments:
This appears to be caused by checkpointAckMessageFileMap. The log files are not GC'd, and the KAHA_ACK_MESSAGE_FILE_MAP_COMMAND is replicated and the DB log files continue to expand - this can become exponential. Side effect of also not checking storage size in checkpoint update can cause the DB log files to exceed any set limits. The real critical part is the duplicated and leaking Kaha messages which appears to happen with durable subscribers.
