HTTP 500 Error while searching for assest in folder

Hi,

frequently i face java.lang.runtimeexception: HTTP 500 error while calling rest url for searching assets in folder. i am facing this issue in production environment.

logs of rest call :

inside webservice url
folder.cfc?method=getfolders&api_key=&folderid=52FB441B1716430FBB8456C354820C6F

1 * Client out-bound request

folder.cfc?method=getfolders&api_key=&folderid=52FB441B1716430FBB8456C354820C6F

1 > Accept: application/json

2 * Client out-bound request

folder.cfc?method=getfolders&api_key=&folderid=52FB441B1716430FBB8456C354820C6F

2 > Accept: application/json

3 * Client out-bound request

/folder.cfc?method=getfolders&api_key=&folderid=52FB441B1716430FBB8456C354820C6F

3 > Accept: application/json

4 * Client out-bound request

folder.cfc?method=getfolders&api_key=&folderid=52FB441B1716430FBB8456C354820C6F

4 > Accept: application/json

4 * Client in-bound response

4 < 500

4 < cache-control: no-cache

4 < p3p: CP=“NON CUR OTPi OUR
NOR UNI”

4 < content-type: text/html

4 < content-length: 1756

4 < server: WebSEAL/7.0.0.0 (Build 121024)

4 < date: Fri, 14 Nov 2014 06:55:16
GMT

4 < pragma: no-cache