ChrisHegarty commented on code in PR #13535:
URL: https://github.com/apache/lucene/pull/13535#discussion_r1665875714
##########
lucene/core/src/java/org/apache/lucene/index/ReadersAndUpdates.java:
##########
@@ -578,7 +578,8 @@ public synchronized boolean writeFieldUpdates(
// IndexWriter.commitMergedDeletes).
final SegmentReader reader;
if (this.reader == null) {
- reader = new SegmentReader(info, indexCreatedVersionMajor,
IOContext.READONCE);
+ IOContext context = info.info.getUseCompoundFile() ? IOContext.DEFAULT
: IOContext.READONCE;
Review Comment:
Reverting this results in the following failure:
```
java.lang.IllegalStateException: confined
at
__randomizedtesting.SeedInfo.seed([E35616674660C0C9:EB8233FC2A66214D]:0)
at
org.apache.lucene.store.MemorySegmentIndexInput.ensureNotConfined(MemorySegmentIndexInput.java:108)
at
org.apache.lucene.store.MemorySegmentIndexInput.clone(MemorySegmentIndexInput.java:539)
at
org.apache.lucene.store.MemorySegmentIndexInput$SingleSegmentImpl.clone(MemorySegmentIndexInput.java:661)
at
org.apache.lucene.tests.store.MockIndexInputWrapper.clone(MockIndexInputWrapper.java:94)
at
org.apache.lucene.tests.store.MockIndexInputWrapper.clone(MockIndexInputWrapper.java:30)
at
org.apache.lucene.codecs.CodecUtil.checksumEntireFile(CodecUtil.java:607)
at
org.apache.lucene.codecs.blocktreeords.OrdsBlockTreeTermsReader.<init>(OrdsBlockTreeTermsReader.java:100)
at
org.apache.lucene.tests.codecs.mockrandom.MockRandomPostingsFormat.fieldsProducer(MockRandomPostingsFormat.java:379)
at
org.apache.lucene.codecs.perfield.PerFieldPostingsFormat$FieldsReader.<init>(PerFieldPostingsFormat.java:328)
at
org.apache.lucene.codecs.perfield.PerFieldPostingsFormat.fieldsProducer(PerFieldPostingsFormat.java:390)
at
org.apache.lucene.index.SegmentCoreReaders.<init>(SegmentCoreReaders.java:98)
at
org.apache.lucene.index.SegmentReader.<init>(SegmentReader.java:95)
at
org.apache.lucene.index.ReadersAndUpdates.writeFieldUpdates(ReadersAndUpdates.java:581)
at org.apache.lucene.index.ReaderPool.commit(ReaderPool.java:353)
at
org.apache.lucene.index.IndexWriter.writeReaderPool(IndexWriter.java:3990)
at
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:3692)
at
org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:4122)
at
org.apache.lucene.index.IndexWriter.shutdown(IndexWriter.java:1331)
at org.apache.lucene.index.IndexWriter.close(IndexWriter.java:1369)
at org.apache.lucene.util.IOUtils.close(IOUtils.java:85)
at org.apache.lucene.util.IOUtils.close(IOUtils.java:72)
at
org.apache.lucene.index.TestNumericDocValuesUpdates.testMultipleUpdatesSameDoc(TestNumericDocValuesUpdates.java:116)
...
```
`CodecUtil.checksumEntireFile` is cloning. It could just slice the whole
input.
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