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From: Neil W. <nei...@pi...> - 2017-10-02 21:34:33
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Thanks for reporting this problem. This is a very strange issue because the NullPointerException shows that the server is encountering a null variable (the suppressNextResponse AtomicBoolean member in the LDAPListenerClientConnection class) that is final and initialized to a non-null value in the LDAPListenerClientConnection constructor. However, I think that what’s going on is that the LDAPListenerClientConnection constructor is creating a new request handler instance before it’s initializing that suppressNextResponse variable, and it’s providing an instance of the partially-initialized client connection instance to that request handler. In this case, that request handler happens to be an instance of your ProxyListenerRequestHandler, but I don’t think that anything in your code is responsible for the exception. I just committed a change that I think will fix this. It ensures that suppressNextResponse (and one other variable) are initialized before creating the request handler instance. You can test it by checking out and building the LDAP SDK from either the SourceForge or GitHub repository (just check out the code and run build.sh or build.bat, then take the unboundid-ldapsdk.jar file from the resulting build/package/unboundid-ldapsdk-4.0.2 directory). If this works, then you can just run with that version that you built for yourself until the next release of the LDAP SDK, which should hopefully happen around the end of the month. Neil On Mon, Oct 2, 2017 at 2:44 PM, Bryan Larson <bla...@gm...> wrote: > Hello, > > I've recently implemented an LDAP proxy cache using Unboundid to handle > the requests. I accomplished this by extending the > LDAPListenerRequestHandler class and forwarding to a ProxyRequestHandler > for binds, etc. and overriding the search and other relevant operations to > look in a cache (using the search filter as the cache key). > > The above appears to be working successfully. However, I've had > difficulty when running the proxy under load. I will start to get flooded > with this stack trace: > > java.lang.NullPointerException > > at com.unboundid.ldap.listener.LDAPListenerClientConnection.sendMessage( > LDAPListenerClientConnection.java:661) > > at com.unboundid.ldap.listener.LDAPListenerClientConnection. > sendSearchResultEntry(LDAPListenerClientConnection.java:728) > > at com.unboundid.ldap.listener.LDAPListenerClientConnection. > sendSearchResultEntry(LDAPListenerClientConnection.java:797) > > at ldap.proxy.cache.ProxyListenerRequestHandler.processSearchRequest( > ProxyListenerRequestHandler.java:122) > > at com.unboundid.ldap.listener.LDAPListenerClientConnection.run( > LDAPListenerClientConnection.java:584) > > FYI - the ProxyListenerRequestHandler class is my own. There's nothing > overly proprietary in there, so I would be willing to disclose my own > source code if it helped track down an issue. > > It's worth noting that I'm currently using version 3.2.0 of the LDAP SDK. > It's also worth noting that I am not tethered to that version. Open to > upgrading if it's worthwhile. > > Anything stand out, or anywhere that I should look? I'm fearful that > there are some non-threadsafe things going on here, but not sure at the > moment. > > Thanks, > Bryan > > ------------------------------------------------------------ > ------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > ldap-sdk-discuss mailing list > lda...@li... > https://lists.sourceforge.net/lists/listinfo/ldap-sdk-discuss > > -- *CONFIDENTIALITY NOTICE: This email may contain confidential and privileged material for the sole use of the intended recipient(s). Any review, use, distribution or disclosure by others is strictly prohibited. If you have received this communication in error, please notify the sender immediately by e-mail and delete the message and any file attachments from your computer. Thank you.* |
