https://bz.apache.org/bugzilla/show_bug.cgi?id=66142
Bug ID: 66142 Summary: Encounter "ejectedExecutionException: Queue capacity is full" when #busy thread is less than minSpareThreads Product: Tomcat 8 Version: 8.5.76 Hardware: PC OS: Mac OS X 10.1 Status: NEW Severity: normal Priority: P2 Component: Catalina Assignee: dev@tomcat.apache.org Reporter: eddie...@sap.com Target Milestone: ---- Created attachment 38326 --> https://bz.apache.org/bugzilla/attachment.cgi?id=38326&action=edit number of busy thread vs total threads. The setup: <Executor name="tomcatThreadPool" namePrefix="exec-" maxThreads="100" minSpareThreads="50" maxQueueSize="50" /> Warning and call stack when issue happened: WARN [NioEndpoint] [][]Executor rejected socket [org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper@1c14500a:org.apache.tomcat.util.net.NioChannel@6279c985:java.nio.channels.SocketChannel [connected local=/xxx:xx remote=/xxx:xx]] for processing java.util.concurrent.RejectedExecutionException: Queue capacity is full at org.apache.tomcat.util.threads.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1413) at org.apache.tomcat.util.threads.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1376) at org.apache.catalina.core.StandardThreadExecutor.execute(StandardThreadExecutor.java:174) but according to Zabbix monitoring (refer to attached screenshot): number of busy threads never exceeds 29. suspect there is potential issue inside thread pool. -- You are receiving this mail because: You are the assignee for the bug. --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@tomcat.apache.org For additional commands, e-mail: dev-h...@tomcat.apache.org