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java.lang.String.isEmpty()Z
java.lang.NoSuchMethodError: java.lang.String.isEmpty()Z	at oracle.dbtools.apex.security.Security.isValidRequest(Security.java:86)	at oracle.dbtools.apex.ModApex.validateRequest(ModApex.java:197)	at oracle.dbtools.apex.ModApex.doGet(ModApex.java:65)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)