It is because your IS getting too many requests to handle and thus out of memory…
So pl check the IS server.sh/bat file how much memory you allocated in the MIN/MAX JVM setting for your DEV IS? Also did you check the service usage and stats/logs to make sure any load of requests are being running and this is the key for analyzing the issue to resolve.
It depends on your OS memory availability also and try allocate it accordingly and restart the IS to and see if if the error still persists?
HTH
RMG
#Integration-Server-and-ESB#webMethods#webMethods-Archive