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https://issues.apache.org/jira/browse/DIRSERVER-1180?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12611635#action_12611635
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Emmanuel Lecharny commented on DIRSERVER-1180:
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After having debugged the sserver, here is what is happening :
The PDU is incorrect. It contains those bytes :
A4 06 // A substring filter, length 6
04 02 C N // The attribute being filtered (cn)
30 00 // No initial, no Any and no final. This is totally wrong.
1) JNDI don't parser invalid filters correctly, so it sends bad PDU
2) The bad PDU is correctly handled by the decoder, which corretcly throws a
DecodingException
3) The LdapServer ProtocolHandler exceptionCautgh method is supposed to send
back a message
This is where things get tricky. The response iss null, so MINA does not send
back any kind of message, and the client is waiting forever for a response.
The correct way to handle this case is to close the session, sending back a
ProtocolError message (as requested by the LDAP protocl, when the PDU is
incorrect).
> NPE and hanging search request when using a filter with empty substring
> sequence
> --------------------------------------------------------------------------------
>
> Key: DIRSERVER-1180
> URL: https://issues.apache.org/jira/browse/DIRSERVER-1180
> Project: Directory ApacheDS
> Issue Type: Bug
> Affects Versions: 1.5.3, 1.5.2
> Reporter: Stefan Seelmann
> Assignee: Emmanuel Lecharny
> Priority: Blocker
> Fix For: 1.5.3
>
>
> When starting a search request using the seachfilter (cn=**) the request
> lasts forever. I testet with JNDI and ldapsearch command.
> Here is the server log:
> [00:22:01] ERROR
> [org.apache.directory.shared.ldap.codec.actions.StoreAnyAction] - The
> substring any filter is empty
> [00:22:01] WARN
> [org.apache.directory.server.ldap.LdapServer$LdapProtocolHandler] -
> [/127.0.0.1:47315] Unexpected exception from exceptionCaught handler.
> java.lang.NullPointerException: message
> at
> org.apache.mina.common.IoFilter$WriteRequest.<init>(IoFilter.java:333)
> at
> org.apache.mina.common.support.BaseIoSession.write(BaseIoSession.java:177)
> at
> org.apache.mina.common.support.BaseIoSession.write(BaseIoSession.java:168)
> at
> org.apache.directory.server.ldap.LdapServer$LdapProtocolHandler.exceptionCaught(LdapServer.java:1104)
> at
> org.apache.mina.common.support.AbstractIoFilterChain$TailFilter.exceptionCaught(AbstractIoFilterChain.java:564)
> at
> org.apache.mina.common.support.AbstractIoFilterChain.callNextExceptionCaught(AbstractIoFilterChain.java:345)
> at
> org.apache.mina.common.support.AbstractIoFilterChain.access$1000(AbstractIoFilterChain.java:53)
> at
> org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.exceptionCaught(AbstractIoFilterChain.java:643)
> at
> org.apache.mina.common.IoFilterAdapter.exceptionCaught(IoFilterAdapter.java:75)
> at
> org.apache.mina.common.support.AbstractIoFilterChain.callNextExceptionCaught(AbstractIoFilterChain.java:345)
> at
> org.apache.mina.common.support.AbstractIoFilterChain.access$1000(AbstractIoFilterChain.java:53)
> at
> org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.exceptionCaught(AbstractIoFilterChain.java:643)
> at
> org.apache.mina.filter.executor.ExecutorFilter.processEvent(ExecutorFilter.java:224)
> at
> org.apache.mina.filter.executor.ExecutorFilter$ProcessEventsRunnable.run(ExecutorFilter.java:264)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> at java.lang.Thread.run(Thread.java:636)
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