uschindler commented on code in PR #1360:
URL: https://github.com/apache/solr/pull/1360#discussion_r1125444982
##########
solr/core/src/java/org/apache/solr/core/MMapDirectoryFactory.java:
##########
@@ -63,7 +63,7 @@ protected Directory create(String path, LockFactory
lockFactory, DirContext dirC
throws IOException {
MMapDirectory mapDirectory = new MMapDirectory(Path.of(path), lockFactory,
maxChunk);
try {
- mapDirectory.setUseUnmap(unmapHack);
+ System.setProperty(MMapDirectory.ENABLE_UNMAP_HACK_SYSPROP,
String.valueOf(unmapHack));
Review Comment:
Do it like that:
```java
public class MMapDirectoryFactory extends StandardDirectoryFactory {
private static final Logger log =
LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
boolean preload;
private long maxChunk;
@Override
public void init(NamedList<?> args) {
super.init(args);
SolrParams params = args.toSolrParams();
maxChunk = params.getLong("maxChunkSize",
MMapDirectory.DEFAULT_MAX_CHUNK_SIZE);
if (maxChunk <= 0) {
throw new IllegalArgumentException("maxChunk must be greater than 0");
}
if (params.get("unmap") != null) {
log.warn("It is no longer possible to configure unmapping of index
files on DirectoryFactory level in solrconfig.xml.");
log.warn("To disable unmapping, pass
-Dorg.apache.lucene.store.MMapDirectory.enableUnmapHack=false on Solr's command
line.");
}
preload = params.getBool("preload", false); // default turn-off
}
@Override
protected Directory create(String path, LockFactory lockFactory,
DirContext dirContext)
throws IOException {
MMapDirectory mapDirectory = new MMapDirectory(Path.of(path),
lockFactory, maxChunk);
mapDirectory.setPreload(preload);
return mapDirectory;
}
}
```
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