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Disable asyncIO prefetching on Windows #136207

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Disable asyncIO prefetching on Windows #136207

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Disable asyncIO prefetching on Windows
iverase Oct 8, 2025
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Apply suggestions from code review
benwtrent Oct 8, 2025
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[CI] Auto commit changes from spotless
Oct 8, 2025
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Merge branch 'main' into disablePrefetchingWindows
iverase Oct 9, 2025
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2 changes: 2 additions & 0 deletions server/src/main/java/org/elasticsearch/index/store/FsDirectoryFactory.java
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Expand Up @@ -181,6 +181,8 @@ public static final class HybridDirectory extends NIOFSDirectory {
public HybridDirectory(LockFactory lockFactory, MMapDirectory delegate, int asyncPrefetchLimit) throws IOException {
super(delegate.getDirectory(), lockFactory);
this.delegate = delegate;
// disable prefetching, see https://github.com/elastic/elasticsearch/issues/136151
asyncPrefetchLimit = 0;

DirectIODirectory directIO;
try {
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