DDS 9th topic causes a crash

Question

I am using DDS (more specifically RTI DDS) for a java application. I am creating each topic for my DDS implementation one by one in code so thus I can test each one with a DDS spy after the code is written. When I wrote the 8th topic everything worked fine. However when I then wrote the 9th topic, nothing seemed to happen as the program seemed to stop somewhere. I then debugged and after a lot of stepping into code, got this printed to council.

#
# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0x01349a58, pid=16109, tid=2429123440
#
# JRE version: Java(TM) SE Runtime Environment (7.0_65-b17) (build 1.7.0_65-b17)
# Java VM: Java HotSpot(TM) Server VM (24.65-b04 mixed mode linux-x86 )
# Problematic frame:
# V  [libjvm.so+0x48aa58]  java_lang_String::utf8_length(oopDesc*)+0x58
#
# Core dump written. Default location: /home/foo/core or core.16109
#
# An error report file with more information is saved as:
# 
# /home/foo/corehs_err_pid16109.log
#
# If you would like to submit a bug report, please visit:
#   http://bugreport.sun.com/bugreport/crash.jsp
#
[D0000|ENABLE]COMMENDSrReaderService_new:!create worker-specific object
[D0000|ENABLE]PRESPsService_enable:!create srr (strict reliable reader)
[D0000|ENABLE]DDS_DomainParticipantService_enable:!enable publish/subscribe service
[D0000|ENABLE]DDS_DomainParticipant_enableI:!enable service

I am not sure why this has happened all of a sudden when I created my 9th topic, yet if I only have 8 it works great. I have tried to increase my resourcelimits as well and get an Immutable QOS Policy error. Does anyone know why this error is occurring in terms of why my 9th topic causes a failure and how to fix the problem? I am running my application on 32 bit RHEL 6.6.

Answer 1

I found on this is because of the max objects per thread by default is set to 8 by the qos. To change this setting, before your first topic is created you must do the following.

    DomainParticipantFactoryQos factoryQos = 
            new DomainParticipantFactoryQos();
    DomainParticipantFactory.TheParticipantFactory.get_qos(factoryQos);
    factoryQos.resource_limits.max_objects_per_thread = 2048;
    DomainParticipantFactory.TheParticipantFactory.set_qos(factoryQos);

This then sets the size before the DDS starts and is thus editable and not immutable at that point.