thecoop commented on code in PR #16883:
URL: https://github.com/apache/lucene/pull/16883#discussion_r4350260798
##########
lucene/core/src/java/org/apache/lucene/codecs/lucene90/Lucene90CompoundReader.java:
##########
@@ -176,28 +182,50 @@ public IndexInput openInput(String name, IOContext
context) throws IOException {
+ entries.keySet()
+ ")");
}
- IndexInput data = context.context() == IOContext.Context.MERGE ?
mergeHandle() : handle;
- return data.slice(name, entry.offset, entry.length, context);
+ synchronized (this) {
+ Mapping mapping = mappingFor(id, context);
+ IndexInput slice = mapping.data.slice(name, entry.offset, entry.length,
context);
+ mapping.firstOpens.putIfAbsent(id, slice);
Review Comment:
It's a bit odd having the id each mapping is for inside the first map. Can
`mappings` be a `Map<String, List<IndexInput>>` instead?
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