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Editorial Team
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Asked: 2026-05-26T22:19:00+00:00

I am seeing this when I try to login with CAS which is authenticating

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I am seeing this when I try to login with CAS which is authenticating against AD over LDAP. 

SEVERE: Servlet.service() for servlet cas threw exception
javax.naming.NameNotFoundException: [LDAP: error code 32 - 0000208D: NameErr: DSID-031001E5, problem 2001 (NO_OBJECT), data 0, best match of:
    ''
]; remaining name '/'
    at com.sun.jndi.ldap.LdapCtx.mapErrorCode(LdapCtx.java:3092)
    at com.sun.jndi.ldap.LdapCtx.processReturnCode(LdapCtx.java:3013)
    at com.sun.jndi.ldap.LdapCtx.processReturnCode(LdapCtx.java:2820)
    at com.sun.jndi.ldap.LdapCtx.searchAux(LdapCtx.java:1829)
    at com.sun.jndi.ldap.LdapCtx.c_search(LdapCtx.java:1752)
    at com.sun.jndi.toolkit.ctx.ComponentDirContext.p_search(ComponentDirContext.java:368)
    at com.sun.jndi.toolkit.ctx.PartialCompositeDirContext.search(PartialCompositeDirContext.java:338)
    at javax.naming.directory.InitialDirContext.search(InitialDirContext.java:257)
    at org.springframework.ldap.core.LdapTemplate$3.executeSearch(LdapTemplate.java:231)
    at org.springframework.ldap.core.LdapTemplate.search(LdapTemplate.java:293)
    at org.springframework.ldap.core.LdapTemplate.search(LdapTemplate.java:237)
    at org.springframework.ldap.core.LdapTemplate.search(LdapTemplate.java:588)
    at org.springframework.ldap.core.LdapTemplate.search(LdapTemplate.java:546)
    at org.springframework.ldap.core.LdapTemplate.search(LdapTemplate.java:401)
    at org.springframework.ldap.core.LdapTemplate.search(LdapTemplate.java:421)
    at org.springframework.ldap.core.LdapTemplate.search(LdapTemplate.java:441)

Up to that point I was authenticated by the BindLdapAuthenticationHandler, resolved, it generated a query builder and then threw this.

I think it is failing when it is trying to get attributes back. Why is the remaining name '/'?

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1 Answer

  1. Editorial Team

    Remaining name is a part of a DN that wasn’t actually found at a certain level of a DIT. For example when you search cn=johns,ou=marketing,dc=example,dc=com and ou=marketing,dc=example,dc=com exists but cn=johns does not exists inside of ou=marketing then the remaning name would be cn=johns.

    ‘/’ does not look like a valid RDN. I would recommend to verify what you pass as a search base. Most likely it’s an invalid DN string.

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