Q: What are the possible reasons of SuperMap iServer services collapse?

A: There are possible reasons:

(1) If iServer services crash when use large file caches on AIX, because the file cache is beyond the memory size that AIX system allows processes to use. On AIX, the data segment allowed processes to use limits the available memory size. The number of data segment is controlled by LDR CNTRL environment variables. If you set the process data segment number to 8, the memory size is: 8*256MB=2GB export LDR_CNTRL=MAXDATA=0x80000000

(2) If it crashes when using a map service, please check whether this machine is installed and started the kingsoft poison anti-virus software. Turning on kingsoft may cause iServer services to crash.

(3) The Tomcat 7.0.29 will cause memory leaks, please change to other Tomcat versions, such as Tomcat 7.0.26.