Hello,
Today, while using Lucene 1.9-rc1-dev, I encountered this exception:
java.lang.NullPointerException
at org.apache.lucene.store.FSDirectory.create(FSDirectory.java:174)
at org.apache.lucene.store.FSDirectory.init(FSDirectory.java:150)
at org.apache.lucene.store.FSDirectory.getDirectory(FSDirectory.java:122)
at org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:225)
Puzzled, I added some debugging println() statements in FSDirectory and
found out that java.io.tmpdir did not exist in my setup. It may be that
I am in a unique situation, having accidentally changed that value to
some non-existent directory. If I'm not, someone else might encounter
the same problem. Just in case, below is the little patch I generated
from the change I came up with.
Mike
Index: org/apache/lucene/store/FSDirectory.java
===================================================================
--- org/apache/lucene/store/FSDirectory.java (revision 230511)
+++ org/apache/lucene/store/FSDirectory.java (working copy)
@@ -146,6 +146,13 @@
else {
lockDir = new File(LOCK_DIR);
}
+ // Ensure that lockDir exists and is a directory.
+ if (!lockDir.exists()) {
+ if (!lockDir.mkdirs())
+ throw new IOException("Cannot create directory: " + lockDir);
+ } else if (!lockDir.isDirectory()) {
+ throw new IOException("Found regular file where directory
expected: " + lockDir);
+ }
if (create) {
create();
}
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