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Posted to dev@lucene.apache.org by "Mikhail Khludnev (JIRA)" <ji...@apache.org> on 2016/10/14 06:11:20 UTC

[jira] [Commented] (SOLR-7115) UpdateLog can miss closing transaction log objects.

    [ https://issues.apache.org/jira/browse/SOLR-7115?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15574375#comment-15574375 ] 

Mikhail Khludnev commented on SOLR-7115:
----------------------------------------

{code}
-        synchronized (solrCoreState.getUpdateLock()) {
-          if (ulog != null) ulog.preSoftCommit(cmd);
-          if (cmd.openSearcher) {
-            core.getSearcher(true, false, waitSearcher);
-          } else {
-            // force open a new realtime searcher so realtime-get and versioning code can see the latest
-            RefCounted<SolrIndexSearcher> searchHolder = core.openNewSearcher(true, true);
-            searchHolder.decref();
+        try{
+          synchronized (solrCoreState.getUpdateLock()) {
+            if (ulog != null) ulog.preSoftCommit(cmd);
+            if (cmd.openSearcher) {
+              core.getSearcher(true, false, waitSearcher);
+            } else {
+              // force open a new realtime searcher so realtime-get and versioning code can see the latest
+              RefCounted<SolrIndexSearcher> searchHolder = core.openNewSearcher(true, true);
+              searchHolder.decref();
+            }
+            if (ulog != null) {
+              ulog.postSoftCommit(cmd);
+            }
           }
-          if (ulog != null) ulog.postSoftCommit(cmd);
         }
-        if (ulog != null) ulog.postCommit(cmd); // postCommit currently means new searcher has
-                              // also been opened
+        finally{
+          if (ulog != null) {
+            ulog.postCommit(cmd); // postCommit currently means new searcher has
+                                  // also been opened
+          }
+        }
       }
{code}
Please have a look...

> UpdateLog can miss closing transaction log objects.
> ---------------------------------------------------
>
>                 Key: SOLR-7115
>                 URL: https://issues.apache.org/jira/browse/SOLR-7115
>             Project: Solr
>          Issue Type: Bug
>            Reporter: Mark Miller
>             Fix For: 6.3
>
>         Attachments: SOLR-7115-LargeVolumeEmbeddedTest-fail.txt, SOLR-7115.patch, SOLR-7115.patch
>
>
> I've seen this happen on YourKit and in various tests - especially since adding resource release tracking to the log objects. Now I've got a test that catches it in SOLR-7113.
> It seems that in precommit, if prevTlog is not null, we need to close it because we are going to overwrite prevTlog with a new log.



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