HPE Ezmeral Data Fabric Streams C Client 0.9.1 - 1703 Release Notes
Release notes for the HPE Ezmeral Data Fabric Streams C client included in the MapR Converged Data Platform. The notes below relate specifically to the MapR Converged Data Platform.
Version | 0.9.1 |
Release Date | April 2017 |
MapR Version Interoperability | See EEP Components and OS Support |
Package Names | Package Names for Ecosystem Packs (EEPs) |
New in This Release
This is the initial release of the HPE Ezmeral Data Fabric Streams C Client. You can use HPE Ezmeral Data Fabric Streams C Client on MapR cluster version 5.2.1 and above.
Fixes
- Fix for bug 778 (Double free when using "topic.blacklist" setting) has been backported into this release.
Known Issues and Limitations
- MapR-26629:Application memory usage may be high due to fragmentation when Glibc Malloc is in use. In this case, consider tuning the MAX_MALLOC_ARENA environment variable or the M_ARENA_MAX tunable to a lower value, such as 1. When the value is 1, the amount of fragmentation decreases and the memory usage generally decreases by 3 or 4 times as well.
- MapR-26602:Kafka script
bin/kafka-consumer-groups.sh
cannot be used to obtain the consumer group list. - MapR-26331:HPE Ezmeral Data Fabric Streams C Client commits when "enable.auto.commit"= true and "auto.commit.interval.ms"=0. Apache librdkafka, does not commit in this case.
- MapR-26279:When a producer application creates multiple threads using
pthread_create() and also calls rd_kafka_destroy(), the Streams C client logs the
following error:
This issue also occurs with Apache librdkafka 0.9.1.rdkafka.c:527:rd_kafka_destroy_app: assert: !*"failed to join main thread"
Resolved Issues
None.