[DIRAPI-97] Unreliable LdapConnectionPool: org.apache.directory.ldap.client.api.exception.InvalidConnectionException: Cannot connect on the server, the connection is invalid

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Duplicate
• Affects Version/s: 1.0.0-M13
• Fix Version/s: 1.0.0-M14

Environment

Karaf
  Karaf version 2.3.0
  Karaf home /home/karaf/karaf
  Karaf base /home/karaf/karaf
  OSGi Framework org.apache.felix.framework - 4.0.3

JVM
  Java Virtual Machine Java HotSpot(TM) Server VM version 23.5-b02
  Version 1.7.0_09
  Vendor Oracle Corporation
  Uptime 4 days 7 hours
  Total compile time 54.019 seconds
Threads
  Live threads 119
  Daemon threads 92
  Peak 149
  Total started 3151
Memory
  Current heap size 63,365 kbytes
  Maximum heap size 506,816 kbytes
  Committed heap size 126,912 kbytes
  Pending objects 0
  Garbage collector Name = 'Copy', Collections = 970, Time = 6.659 seconds
  Garbage collector Name = 'MarkSweepCompact', Collections = 111, Time = 31.891 seconds
Classes
  Current classes loaded 13,396
  Total classes loaded 15,142
  Total classes unloaded 1,746
Operating system
  Name Linux version 3.6.5-linode47
  Architecture i386
  Processors 4

• Assignee: Unassigned
• Reporter: Hendy Irawan
• Created: 28/Nov/12 03:48
• Updated: 08/Jan/15 17:05
• Resolved: 18/Dec/12 13:51

Description

We use LdapConnectionPool exclusively in order to increase performance without sacrificing stability.

However, it seems that it's possible to break this and will cause :

Caused by: org.apache.directory.shared.ldap.model.exception.LdapException: org.apache.directory.ldap.client.api
.exception.InvalidConnectionException: Cannot connect on the server, the connection is invalid
        at org.apache.directory.ldap.client.api.LdapNetworkConnection.lookup(LdapNetworkConnection.java:3169)
        at org.apache.directory.ldap.client.api.LdapNetworkConnection.lookup(LdapNetworkConnection.java:3181)
        at org.apache.directory.ldap.client.api.LdapNetworkConnection.lookup(LdapNetworkConnection.java:3116)
        at id.co.bippo.shop.LdapShopDao$1.apply(LdapShopDao.java:88)
        ... 78 more
Caused by: org.apache.directory.ldap.client.api.exception.InvalidConnectionException: Cannot connect on the ser
ver, the connection is invalid
        at org.apache.directory.ldap.client.api.LdapNetworkConnection.checkSession(LdapNetworkConnection.java:2
72)
        at org.apache.directory.ldap.client.api.LdapNetworkConnection.searchAsync(LdapNetworkConnection.java:15
48)
        at org.apache.directory.ldap.client.api.LdapNetworkConnection.search(LdapNetworkConnection.java:1586)
        at org.apache.directory.ldap.client.api.LdapNetworkConnection.lookup(LdapNetworkConnection.java:3151)
        ... 81 more

When it gets to this state, repeated calls to borrowObject/returnObject seem to return the same invalid connection(s).

I can think of several reason why the connection was invalidated: LDAP connection breaks, LDAP server was restarted, but can be anything, really. However, I expect the pool would handle this, and purge invalid connections automatically.

So that when ldapPool.borrowObject(); is called, the LdapConnection given should be valid & ready to use.

Issue Links

• is a clone of: DIRAPI-96 Connection leak in LdapConnectionPool.
• is related to: DIRAPI-96 Connection leak in LdapConnectionPool.