fix for npe (in rare cases)

10 years ago · 7856fbdbe8
parent 8a2b569d7c
commit 7856fbdbe8
1 changed files with 3 additions and 1 deletions
--- a/source/net/yacy/cora/federate/solr/connector/AbstractSolrConnector.java
+++ b/source/net/yacy/cora/federate/solr/connector/AbstractSolrConnector.java
@ -174,7 +174,9 @@ public abstract class AbstractSolrConnector implements SolrConnector {
                        
                        try {
                            SolrDocument d = getDocumentById(nextID, fields);
-                            try {queue.put(d);} catch (final InterruptedException e) {}
+                            // document may be null if another process has deleted the document meanwhile
+                            // in case that the document is absent then, we silently ignore that case
+                            if (d != null) try {queue.put(d);} catch (final InterruptedException e) {}
                        } catch (final SolrException | IOException e) {
                            ConcurrentLog.logException(e);
                            // fail