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Date: Mon, 18 Apr 2011 18:35:31 +0200
Message-ID: <BANLkTinKf7vSquo0Pj2CMkkWW5_o9m__nw@mail.gmail.com>
Subject: solr-3.1.0 bug/multicore
From: Rasmus Hahn <rassahah@googlemail.com>
To: dev@lucene.apache.org
Content-Type: text/plain; charset=ISO-8859-1

Good Morning,

i noticed a small bug in your solr-3.1.0 release, but before you read any
further: This should really be a bug report, but i could not find any
possibility to submit a bug report into the jira
(https://issues.apache.org/jira/browse/SOLR). If the latter should be
possible, and someone can point me to a tutorial (best with screenshots)
on where to report bugs, do not hesitate and give me a pointer. Otherwise:

Phenomenon: in a multicore solr, when using the RENAME-action for two cores,
and a solr.xml with persistent='true', the renamed core, does not get its
name persisted in solr.xml; the old name is stored (only the solr.xml file
is wrong, the in-memory-cache is correct).

Reason: in org/apache/solr/core/CoreContainer.java, when persisting the
CoreContainer, solr-3.1.0 writes the values of the private cores-map
(solr-1.4.1 wrote the keys, too). To get the name of the core, the core's
CoreDescriptor is used, but for a RENAME, the core's descriptor is not being
updated.

Fix: i changed this in the register-function of the CoreContainer class,
since it is similar to the SWAP-operation that does a similar thing.

Patch:
  (against https://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_3_1)

Index: solr/src/java/org/apache/solr/core/CoreContainer.java
===================================================================
--- solr/src/java/org/apache/solr/core/CoreContainer.java
(revision 1094545)
+++ solr/src/java/org/apache/solr/core/CoreContainer.java       (working copy)
@@ -381,7 +381,12 @@
     SolrCore old = null;
     synchronized (cores) {
       old = cores.put(name, core);
+      /*
+       * set both the name of the descriptor and the name of the
+       * core, since the descriptors name is used for persisting.
+       */
       core.setName(name);
+      core.getCoreDescriptor ().name = name;
     }


Best Regards - Rasmus

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