java.lang.Thread.State: BLOCKED at lucee.runtime.op.date.DateCaster.toDateAdvanced

dateFormat() and timeFormat() accept dates, but also strings (even empty strings). Then Lucee tries to cast these strings internally into date objects. This internal casting happens in a synchronized method. See screenshot.

So the questions are: Must this method be synchronized? Should Lucee accept everything as input, not only date objects?

In our load tests with strings as arguments, we had massive issues with blocked requests.

http-apr-8080-exec-31" Id=1325 BLOCKED on [Ljava.text.SimpleDateFormat;@692f671c owned by "http-apr-8080-exec-182" Id=27277
java.lang.Thread.State: BLOCKED
at lucee.runtime.op.date.DateCaster.toDateAdvanced(DateCaster.java:151)

waiting to lock [Ljava.text.SimpleDateFormat;@692f671c owned by "http-apr-8080-exec-182"
at lucee.runtime.op.date.DateCaster._toDateAdvanced(DateCaster.java:447)
at lucee.runtime.op.date.DateCaster.toDateAdvanced(DateCaster.java:436)
at lucee.runtime.op.Caster.toDate(Caster.java:2843)
at lucee.runtime.functions.displayFormatting.TimeFormat._call(TimeFormat.java:66)
at lucee.runtime.functions.displayFormatting.TimeFormat.call(TimeFormat.java:57)
at core.newsroom.listorder_cfc$cf.udfCall(/contenscms/core/newsroom/listorder.cfc:91)
at api.service.newslist_cfc$cf.udfCall1(/contenscms/api/service/newslist.cfc:22)
at api.api_cfc$cf.udfCall(/contenscms/api/api.cfc:98)
at api.restapi_cfc$cf.udfCall(/contenscms/api/restapi.cfc:72)
at contens.api.rpcendpoint_cfm$cf.call(/contens/api/rpcendpoint.cfm:27)
...

locked org.apache.tomcat.util.net.AprEndpoint$AprSocketWrapper@a1bb395
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)

Locked ownable synchronizers:

• java.util.concurrent.ThreadPoolExecutor$Worker@5f42b42```