Need to consider the read timeout during LDAP context initialization. Here is the exception stack in one nightlt testing:

test/com/sun/jndi/ldap/InvalidLdapFilters.java

#section:main
----------messages:(3/201)----------
command: main InvalidLdapFilters valid (!(&(objectClass=*)(uid=*)))
reason: User specified action: run main/othervm InvalidLdapFilters valid (!(&(objectClass=*)(uid=*)))
elapsed time (seconds): 0.836
----------System.out:(1/20)----------
arguments length: 2
----------System.err:(30/1986)----------
javax.naming.NamingException: LDAP response read timed out, timeout used:1000ms.
at com.sun.jndi.ldap.Connection.readReply(Connection.java:476)
at com.sun.jndi.ldap.LdapClient.ldapBind(LdapClient.java:359)
at com.sun.jndi.ldap.LdapClient.authenticate(LdapClient.java:189)
at com.sun.jndi.ldap.LdapCtx.connect(LdapCtx.java:2788)
at com.sun.jndi.ldap.LdapCtx.<init>(LdapCtx.java:319)
at com.sun.jndi.ldap.LdapCtxFactory.getUsingURL(LdapCtxFactory.java:192)
at com.sun.jndi.ldap.LdapCtxFactory.getUsingURLs(LdapCtxFactory.java:210)
at com.sun.jndi.ldap.LdapCtxFactory.getLdapCtxInstance(LdapCtxFactory.java:153)
at com.sun.jndi.ldap.LdapCtxFactory.getInitialContext(LdapCtxFactory.java:83)
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:684)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:311)
at javax.naming.InitialContext.init(InitialContext.java:244)
at javax.naming.InitialContext.<init>(InitialContext.java:216)
at javax.naming.directory.InitialDirContext.<init>(InitialDirContext.java:101)
at InvalidLdapFilters.doClientSide(InvalidLdapFilters.java:174)
at InvalidLdapFilters.startClient(InvalidLdapFilters.java:270)
at InvalidLdapFilters.<init>(InvalidLdapFilters.java:278)
at InvalidLdapFilters.main(InvalidLdapFilters.java:315)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:474)
at com.sun.javatest.regtest.MainWrapper$MainThread.run(MainWrapper.java:94)
at java.lang.Thread.run(Thread.java:722)
com/sun/jndi/ldap/InvalidLdapFilters.java