memory error: java.lang.NullPointerException #577

Hi, I use BridJ in my projects. using the default java vm arguments, it will show such exceptions messages in c++ kind callback. if I change -Xms512m -Xmx1024m, it will work somewhile and show messages again. I guess the native memory is not enough? How can I do ?

I use the bridJ In tomcat 7.0 and centos

is this error ok?

Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /root/apache-tomcat-7.0.77/temp/BridJExtractedLibraries5614566201250442255/libbridj.so which might have disabled stack guard. The VM will try to fix the stack guard now.
It's highly recommended that you fix the library with 'execstack -c ', or link it with '-z noexecstack'.