[LUCENE-398] ParallelReader crashes when trying to merge into a new index

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.1
• Component/s: core/index

Environment

Operating System: All
Platform: All

• Bugzilla Id: 35454
• Assignee: Yonik Seeley
• Reporter: Sebastian Kirsch
• Created: 22/Jun/05 04:50
• Updated: 28/Aug/22 11:22
• Resolved: 21/Jun/06 03:43

Description

ParallelReader causes a NullPointerException in
org.apache.lucene.index.ParallelReader$ParallelTermPositions.seek(ParallelReader.java:318)
when trying to merge into a new index.

See test case and sample output:

$ svn diff
Index: src/test/org/apache/lucene/index/TestParallelReader.java
===================================================================
— src/test/org/apache/lucene/index/TestParallelReader.java (revision 179785)
+++ src/test/org/apache/lucene/index/TestParallelReader.java (working copy)
@@ -57,6 +57,13 @@

}

+ public void testMerge() throws Exception {
+ Directory dir = new RAMDirectory();
+ IndexWriter w = new IndexWriter(dir, new StandardAnalyzer(), true);
+ w.addIndexes(new IndexReader[]

{ ((IndexSearcher) parallel).getIndexReader() }

);
+ w.close();
+ }
+
private void queryTest(Query query) throws IOException {
Hits parallelHits = parallel.search(query);
Hits singleHits = single.search(query);
$ ant -Dtestcase=TestParallelReader test
Buildfile: build.xml
[...]
test:
[mkdir] Created dir:
/Users/skirsch/text/lectures/da/thirdparty/lucene-trunk/build/test
[junit] Testsuite: org.apache.lucene.index.TestParallelReader
[junit] Tests run: 2, Failures: 0, Errors: 1, Time elapsed: 1.993 sec

[junit] Testcase: testMerge(org.apache.lucene.index.TestParallelReader):
Caused an ERROR
[junit] null
[junit] java.lang.NullPointerException
[junit] at
org.apache.lucene.index.ParallelReader$ParallelTermPositions.seek(ParallelReader.java:318)
[junit] at
org.apache.lucene.index.ParallelReader$ParallelTermDocs.seek(ParallelReader.java:294)
[junit] at
org.apache.lucene.index.SegmentMerger.appendPostings(SegmentMerger.java:325)
[junit] at
org.apache.lucene.index.SegmentMerger.mergeTermInfo(SegmentMerger.java:296)
[junit] at
org.apache.lucene.index.SegmentMerger.mergeTermInfos(SegmentMerger.java:270)
[junit] at
org.apache.lucene.index.SegmentMerger.mergeTerms(SegmentMerger.java:234)
[junit] at
org.apache.lucene.index.SegmentMerger.merge(SegmentMerger.java:96)
[junit] at
org.apache.lucene.index.IndexWriter.addIndexes(IndexWriter.java:596)
[junit] at
org.apache.lucene.index.TestParallelReader.testMerge(TestParallelReader.java:63)
[junit] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[junit] at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
[junit] at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

[junit] Test org.apache.lucene.index.TestParallelReader FAILED

BUILD FAILED
/Users/skirsch/text/lectures/da/thirdparty/lucene-trunk/common-build.xml:188:
Tests failed!

Total time: 16 seconds
$