Servlet failed with Exception java.lang.NullPointerException

<Jul 28, 2016 8:19:17 AM EDT> <Error> <HTTP> <BEA-101020> <[ServletContext@1967088839[app:xxx module:/xxxx path:/xxxx spec-version:2.5]] Servlet failed with Exception

java.lang.NullPointerException

        at jsp_servlet.__xxxtopologyeditor._jspService(__xxxxtopologyeditor.java:656)

        at weblogic.servlet.jsp.JspBase.service(JspBase.java:34)

        at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)

        at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)

        at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:301)

        Truncated. see log file for complete stacktrace

>

<Jul 28, 2016 8:19:17 AM EDT> <Notice> <Diagnostics> <BEA-320068> <Watch 'UncheckedException' with severity 'Notice' on server 'xxx_MS1' has triggered at Jul 28, 2016 8:19:17 AM EDT. Notification details:

WatchRuleType: Log

WatchRule: (SEVERITY = 'Error') AND ((MSGID = 'WL-101020') OR (MSGID = 'WL-101017') OR (MSGID = 'WL-000802') OR (MSGID = 'BEA-101020') OR (MSGID = 'BEA-101017') OR (MSGID = 'BEA-000802'))