drabe8 opened a new issue, #15119: URL: https://github.com/apache/lucene/issues/15119
### Description Similar to https://github.com/apache/lucene/issues/12419 In our use case, we create many IndexWriters on the fly, dependent on the workload assigned to our process. (We use a ByteBuffersDirectory to create discrete indexes for a small subset of the data that a given user is working with.) We see one thread constructing an IndexWriterConfig, waiting for the IndexWriter Class Init monitor: ``` java.lang.Thread.State: RUNNABLE at java.lang.Class.forName0([email protected]/Native Method) - waiting on the Class initialization monitor for org.apache.lucene.index.IndexWriter at java.lang.Class.forName([email protected]/Class.java:421) at java.lang.Class.forName([email protected]/Class.java:412) at org.apache.lucene.internal.tests.TestSecrets.lambda$static$0(TestSecrets.java:43) at org.apache.lucene.internal.tests.TestSecrets$$Lambda/0x00007ff82101b458.accept(Unknown Source) at org.apache.lucene.internal.tests.TestSecrets.<clinit>(TestSecrets.java:51) at org.apache.lucene.index.ConcurrentMergeScheduler.<clinit>(ConcurrentMergeScheduler.java:939) at org.apache.lucene.index.LiveIndexWriterConfig.<init>(LiveIndexWriterConfig.java:130) at org.apache.lucene.index.IndexWriterConfig.<init>(IndexWriterConfig.java:145) ``` And another thread constructing an IndexWriter, waiting for the TestSecrets Class Init monitor: ``` java.lang.Thread.State: RUNNABLE at org.apache.lucene.index.IndexWriter.<clinit>(IndexWriter.java:6597) - waiting on the Class initialization monitor for org.apache.lucene.internal.tests.TestSecrets ``` And thousands of threads are stuck trying to create an IndexWriterConfig, stuck waiting for the ConcurrentMergeScheduler Class Init monitor: ``` java.lang.Thread.State: RUNNABLE at org.apache.lucene.index.LiveIndexWriterConfig.<init>(LiveIndexWriterConfig.java:130) - waiting on the Class initialization monitor for org.apache.lucene.index.ConcurrentMergeScheduler at org.apache.lucene.index.IndexWriterConfig.<init>(IndexWriterConfig.java:145) ``` I believe this is a legitimate use case; when the deadlock occurs, it is a major problem for us. ### Version and environment details Lucene 10.2.2 Java 21.0.7 -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
