RTI Core Libraries and Utilities

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
2973 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
5176 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
6388 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
5640 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
6146 reads — 0 comments

How do I eliminate the long startup delay on some VxWorks targets with no file system?

Note: Applies to RTI Connext 4.x and above. RTI Connext calls fopen() to load the default XML and NDDS_DISCOVERY_PEERS files if they exist. On some VxWorks targets that either have no file system or use NFS, FTP, or some other network-based file system, and the file system is not mounted, RTI ...
ken
Thu, 01/17/2013 - 12:10
4587 reads — 0 comments

Why does rtiddsgen require a C preprocessor for its code generation? Why does rtiddsgen try to locate cc1plus?

Before processing an IDL file, rtiddsgen attempts to run a C preprocessor to support #if tests and related preprocessor directives. There are several options you can pass to rtiddsgen to control preprocessor use, including: -ppDisable (formerly -ppNotRun ) : Don't use the C preprocessor -ppPath : ...
alex
Thu, 01/17/2013 - 12:07
3854 reads — 0 comments

Why is multicast not working on my LynxOS target?

Note: Applies to NDDS 3.x, RTI Connext 4.x and above. The LynxOS 4.0 IP stack (and many other BSD-derived network stacks) will fail to send multicast messages unless there is an entry in the routing table that matches the destination multicast IP address. In practice, this means that either: a ...
memo.salas
Thu, 01/17/2013 - 12:07
4275 reads — 0 comments

What does "shmat() failure, error 0x18" mean on a Solaris system?

This solution addresses the following error message on Solaris systems: RTIOsapiSharedMemorySegment_attach:OS shmat() failure, error 0X18 NDDS_Transport_Shmem_attach_writer:failed to initialize shared memory resourcesegment for key 0x4020d0 Error message 0x18 on a Solaris system means that the ...
gianpiero
Thu, 01/17/2013 - 12:07
4370 reads — 0 comments

Why can't I communicate over loopback, but can using shared memory?

NOTE: Applies to RTI Data Distribution Service 4.1 and 4.2 By default, RTI Data Distribution Service uses shared memory to communicate with other DomainParticipants on the same node and disables local traffic over the UDPv4 or UDPv6 loopback interface. So, by default, an RTI Data Distribution ...
abhi
Thu, 01/17/2013 - 12:07
5786 reads — 0 comments

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