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Published Jul. 2, 2025

LDAP users are unable to log in(Caused by: java.net.SocketException: Connection reset)

Written By

Sivakumar Perumal

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Issue

  • If the LDAP is configured and when the LDAP users are trying to log in, authentication fails and started getting the following error in the server console.
ERROR [liferay/scheduler_dispatch-4][PortalLDAPImporterImpl:717] Unable to import user CN=makansal: null:null:{samaccountname=sAMAccountName: makansal}
javax.naming.CommunicationException: Connection reset [Root exception is java.net.SocketException: Connection reset]; remaining name 'CN=makansal,CN=Users,DC=ad,DC=keysight,DC=com'
 at com.sun.jndi.ldap.LdapCtx.doSearch(LdapCtx.java:2003)
 at com.sun.jndi.ldap.LdapCtx.doSearchOnce(LdapCtx.java:1934)
 at com.sun.jndi.ldap.LdapCtx.c_getAttributes(LdapCtx.java:1327)
 at com.sun.jndi.toolkit.ctx.ComponentDirContext.p_getAttributes(ComponentDirContext.java:231)
 at com.sun.jndi.toolkit.ctx.PartialCompositeDirContext.getAttributes(PartialCompositeDirContext.java:139)
 at javax.naming.directory.InitialDirContext.getAttributes(InitialDirContext.java:152)
 at com.liferay.portal.security.ldap.PortalLDAPUtil._getAttributes(PortalLDAPUtil.java:905)
 at com.liferay.portal.security.ldap.PortalLDAPUtil.getUserAttributes(PortalLDAPUtil.java:582)
 at com.liferay.portal.security.ldap.PortalLDAPImporterImpl.importFromLDAPByUser(PortalLDAPImporterImpl.java:702)
 at com.liferay.portal.security.ldap.PortalLDAPImporterImpl.importFromLDAP(PortalLDAPImporterImpl.java:203)
 at com.liferay.portal.security.ldap.PortalLDAPImporterImpl.importFromLDAP(PortalLDAPImporterImpl.java:139)
 at com.liferay.portal.security.ldap.PortalLDAPImporterImpl.importFromLDAP(PortalLDAPImporterImpl.java:101)
 at com.liferay.portal.security.ldap.PortalLDAPImporterUtil.importFromLDAP(PortalLDAPImporterUtil.java:39)
 at com.liferay.portlet.admin.messaging.LDAPImportMessageListener.doReceive(LDAPImportMessageListener.java:51)
 at com.liferay.portal.kernel.messaging.BaseMessageListener.receive(BaseMessageListener.java:26)
 at sun.reflect.GeneratedMethodAccessor383.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:606)
 at com.liferay.portal.kernel.bean.ClassLoaderBeanHandler.invoke(ClassLoaderBeanHandler.java:67)
 at com.sun.proxy.$Proxy300.receive(Unknown Source)
 at com.liferay.portal.kernel.scheduler.messaging.SchedulerEventMessageListenerWrapper.receive(SchedulerEventMessageListenerWrapper.java:77)
 at com.liferay.portal.kernel.messaging.InvokerMessageListener.receive(InvokerMessageListener.java:72)
 at com.liferay.portal.kernel.messaging.ParallelDestination$1.run(ParallelDestination.java:71)
 at com.liferay.portal.kernel.concurrent.ThreadPoolExecutor$WorkerTask._runTask(ThreadPoolExecutor.java:682)
 at com.liferay.portal.kernel.concurrent.ThreadPoolExecutor$WorkerTask.run(ThreadPoolExecutor.java:593)
 at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.SocketException: Connection reset
 at java.net.SocketInputStream.read(SocketInputStream.java:196)
 at java.net.SocketInputStream.read(SocketInputStream.java:122)
 at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
 at java.io.BufferedInputStream.read1(BufferedInputStream.java:275)
 at java.io.BufferedInputStream.read(BufferedInputStream.java:334)
 at com.sun.jndi.ldap.Connection.run(Connection.java:853)

Environment

  • Liferay DXP 7.0

Resolution

  • The above error will be observed in the server console when there is a communication failure between Liferay and LDAP. Therefore establishing a connection between Liferay and LDAP would ensure successful authentication for LDAP users.
  • To test: Ping the IP address of the LDAP server from the machine where Liferay is running to check whether it is replying or not. 

Additional Information

  • In addition to the above error, the below error can be observed, if the LDAP import option is enabled.
ERROR [liferay/scheduler_dispatch-5][PortalLDAPImporterImpl:210] Error importing LDAP users and groups 
javax.naming.NamingException: LDAP response read timed out, timeout used:15000ms.; remaining name 'CN=Users,DC=ad,DC=keysight,DC=com'
  •  The above error shows the "import" option is enabled in Liferay and it is trying to import the user from LDAP. Since there is some communication/network failure, Liferay waited for 15000ms(as the value is set in portal.properties) to get connected with the LDAP server but still, the connection is not established.
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