org.apache.manifoldcf.core.interfaces.ManifoldCFException: Communication error: ldapdc.mppr:389

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Communication error: ldapdc.mppr:389
org.apache.manifoldcf.core.interfaces.ManifoldCFException: Communication error: ldapdc.mppr:389
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.sun.jndi.ldap.Connection.createSocket(Connection.java:328)
at com.sun.jndi.ldap.Connection.(Connection.java:203)
at com.sun.jndi.ldap.LdapClient.(LdapClient.java:137)
at com.sun.jndi.ldap.LdapClient.getInstance(LdapClient.java:1613)
at com.sun.jndi.ldap.LdapCtx.connect(LdapCtx.java:2746)
at com.sun.jndi.ldap.LdapCtx.(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:313)
at javax.naming.InitialContext.init(InitialContext.java:244)
at javax.naming.ldap.InitialLdapContext.(InitialLdapContext.java:154)
at org.apache.manifoldcf.authorities.authorities.ldap.LDAPAuthority.getSession(LDAPAuthority.java:220)
at org.apache.manifoldcf.authorities.authorities.ldap.LDAPAuthority.getAuthorizationResponse(LDAPAuthority.java:365)
at org.apache.manifoldcf.authorities.system.AuthCheckThread.run(AuthCheckThread.java:96)

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