Hello, I’m digging in an issue getting timeouts doing a managed schema change using the schema api. The call hangs reloading the cores (does not recover until restarting the node):
sun.misc.Unsafe.park(Native Method) java.util.concurrent.locks.LockSupport.parkNanos(Unknown Source) java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireNanos(Unknown Source) java.util.concurrent.locks.AbstractQueuedSynchronizer.tryAcquireNanos(Unknown Source) java.util.concurrent.locks.ReentrantReadWriteLock$WriteLock.tryLock(Unknown Source) org.apache.solr.update.DefaultSolrCoreState.lock(DefaultSolrCoreState.java:179) org.apache.solr.update.DefaultSolrCoreState.newIndexWriter(DefaultSolrCoreState.java:230) org.apache.solr.core.SolrCore.reload(SolrCore.java:696) org.apache.solr.core.CoreContainer.reload(CoreContainer.java:1558) org.apache.solr.schema.SchemaManager.doOperations(SchemaManager.java:133) org.apache.solr.schema.SchemaManager.performOperations(SchemaManager.java:92) org.apache.solr.handler.SchemaHandler.handleRequestBody(SchemaHandler.java:90) org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:211) org.apache.solr.core.SolrCore.execute(SolrCore.java:2596) org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:802) org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:579) After a while I realized it was only deadlocked, after I used the AdminUI to view the segments info of the core. So my question: is this line correct? If withCoreInfo is false iwRef.decref() will not be called to release the reader lock, preventing any further writer locks. https://github.com/apache/lucene-solr/blob/3a743ea953f0ecfc35fc7b198f68d142ce99d789/solr/core/src/java/org/apache/solr/handler/admin/SegmentsInfoRequestHandler.java#L144 Regards, Tiziano
