Mapper codec fails to find item in map.

Incorrect comparison of map_t::iterators in C++ connectivity plug-ins is now detected. If it occurs, an exception “Invalid comparison of iterators into different maps” will be thrown. The correct course of action is to identify the source of the bug and fix it. For operational purposes, the exception may be suppressed by the existence of the environment variable AP_SKIP_DATA_T_ITERATOR_CHECKS.

JMS BEST_EFFORT queue receiving with IBM MQ is painfully slow.

For customers using JMS to receive non-persistent messages from an IBM MQ queue, a change was made (the default receiver maxBatchSize is now 1, that is, AUTO_ACK not CLIENT_ACK) which can enable significant performance improvements if you also add the ?READAHEADALLOWED=YES MQ property to the queue URL (see the IBM documentation for further information about the read-ahead allowed option). This change does not affect other JMS vendors, does not affect topics, and does not affect persistent (reliable) messages.