RTI Core Libraries and Utilities

What do 'setsockopt ADD_MEMBERSHIP' errors mean?

This message can be recieved when creating a new reader listening on a multicast group: setsockopt(ADD_MEMBERSHIP) error 0X62 The hex code may differ across platforms — EADDRINUSE is 98 on Linux, 125 on Solaris — check your system's errno.h to be sure. RTI middleware can share receive-resources ...
gianpiero
Thu, 01/17/2013 - 12:28
7223 reads — 1 comment

How much shared memory is required by RTI Connext applications?

Note: Applies to RTI Connext 4.x and above. By default, every time you create a DDS participant with SHMEM transport enabled, the middleware creates two shared memory segments: one to receive discovery traffic and one to receive user traffic. Each one of the shared memory segments will contain a ...
gianpiero
Thu, 01/17/2013 - 12:26
9250 reads — 0 comments

Why does my subscriber report multiple liveliness change events when I kill my publisher?

Note: Applies to RTI Connext 4.x and above. Upon changing the liveliness lease duration of both the DataReader and DataWriter , and instrumenting the on_liveliness_changed() listener callback on the reader side, you will see the callback is called twice when you kill the publishing application. ...
gianpiero
Thu, 01/17/2013 - 12:23
6130 reads — 0 comments

Can I use a (gcc) compiler version different from what is listed in the Release Notes?

The short answer is that only the platforms listed in the Release Notes are supported. A platform is defined by a CPU architecture, an operating system and its version, and a compiler version. For example, i86Linux2.6gcc4.1.1 means Linux 2.6 on an Intel processor with version 4.1.1of the gcc ...
dstockdill
Thu, 01/17/2013 - 12:23
3778 reads — 0 comments

Can I run my RTI Connext application in a virtual machine?

Yes, you can run your RTI Connext-based application on a virtual machine. Make sure that any time synchronization or jumps occur before starting your RTI Connext application. In versions 4.4b and higher, we have improved support for virtual machines by introducing a feature to specify which clock ...
abhi
Thu, 01/17/2013 - 12:22
3275 reads — 0 comments

What might cause a segmentation fault while reading data? Why do I see an unexpected data sequence length?

Note: Applies to RTI Data Distribution Service 4.1 and 4.2 If a non-keyed DataReader calls take() or read() while max_samples (in the ResourceLimitsQosPolicy ) is LENGTH_UNLIMITED (the default), and, the available data is greater than max_samples_per_read (in the DataReaderResourceLimitsQosPolicy ...
alex
Thu, 01/17/2013 - 12:21
3657 reads — 0 comments

How can I prevent deadlocks while invoking the RTI APIs from a Listener?

Note: Applies to RTI Connext 4.2 and above To prevent deadlocks, RTI uses mutexes to coordinate access to critical data and operations between threads. Mutexes are grouped in Exclusive Areas (EAs) code based on the regions they protect. However, deadlocks are still possible if you try to use ...
elaine
Thu, 01/17/2013 - 12:19
6117 reads — 0 comments

How do I minimize the memory footprint and avoid dynamic memory allocation?

Note: Applies to RTI Connext 4.x and above. The first and foremost step to reducing the memory footprint is an architectural review. The number of topics, the queue sizes, whether or not you use keys, the number of domains, or the usage of partitions have a great impact on the memory footprint of ...
gianpiero
Thu, 01/17/2013 - 12:19
7588 reads — 0 comments

Why do I see a Java 'usage' error when I run rtiddsgen on Windows?

The short answer is that you need to remove the trailing backslash from your NDDSHOME environment variable. The rtiddsgen code generator calls a Java program within a batch script. This script passes %NDDSHOME% as a define argument to java. If NDDSHOME ends with a backslash, the shell escapes the ...
gianpiero
Thu, 01/17/2013 - 12:15
6571 reads — 0 comments

At what OSI layers does RTI Connext operate?

RTI Connext operates across the host layers (4,5,6,7) using an existing Network, Data Link and Physical layer. RTI Connext's Layer 4 interaction is a little bit open to interpretation; RTI Connext uses an existing layer 4 transport (UDP). The RTPS protocol adds reliability and other QoS to it to ...
alex
Thu, 01/17/2013 - 12:12
7520 reads — 0 comments

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