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GraalVM multi-threaded access unsafe in JavaScriptTieredBrokerSelectorStrategy #18253
Description
Affected Version
Versions since #17843 was introduced.
Description
Ran into this error when testing a javascript-based broker routing strategy on Router.
QueryInterruptedException{msg=Multi threaded access requested by thread Thread[qtp123456789,main] but is not allowed for language(s) js., code=Unknown exception, class=java.lang.IllegalStateException, host=null}
at org.apache.druid.query.QueryInterruptedException.wrapIfNeeded(QueryInterruptedException.java:113)
at org.apache.druid.server.AsyncQueryForwardingServlet.handleException(AsyncQueryForwardingServlet.java:117)
at org.apache.druid.server.AsyncQueryForwardingServlet.service(AsyncQueryForwardingServlet.java:271)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:799)
at org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1656)
at org.apache.druid.server.security.PreResponseAuthorizationCheckFilter.doFilter(PreResponseAuthorizationCheckFilter.java:84)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1626)
at org.apache.druid.server.initialization.jetty.StandardResponseHeaderFilterHolder$StandardResponseHeaderFilter.doFilter(StandardResponseHeaderFilterHolder.java:164)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1626)
at org.apache.druid.server.security.AllowHttpMethodsResourceFilter.doFilter(AllowHttpMethodsResourceFilter.java:78)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1626)
at org.apache.druid.server.security.AllowOptionsResourceFilter.doFilter(AllowOptionsResourceFilter.java:74)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1626)
at org.apache.druid.server.security.AllowAllAuthenticator$1.doFilter(AllowAllAuthenticator.java:84)
at org.apache.druid.server.security.AuthenticationWrappingFilter.doFilter(AuthenticationWrappingFilter.java:59)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1626)
at org.apache.druid.server.security.SecuritySanityCheckFilter.doFilter(SecuritySanityCheckFilter.java:77)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1626)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:552)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1624)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1440)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:505)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1594)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1355)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.gzip.GzipHandler.handle(GzipHandler.java:772)
at org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:59)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
at org.eclipse.jetty.server.Server.handle(Server.java:516)
at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:487)
at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:732)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:479)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:277)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105)
at org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:338)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:315)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:173)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)
at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:409)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:883)
at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1034)
at java.base/java.lang.Thread.run(Thread.java:840)
Caused by: java.lang.IllegalStateException: Multi threaded access requested by thread Thread[qtp123456789-263,5,main] but is not allowed for language(s) js.
at com.oracle.truffle.polyglot.PolyglotEngineException.illegalState(PolyglotEngineException.java:135)
at com.oracle.truffle.polyglot.PolyglotContextImpl.throwDeniedThreadAccess(PolyglotContextImpl.java:1197)
at com.oracle.truffle.polyglot.PolyglotContextImpl.checkAllThreadAccesses(PolyglotContextImpl.java:998)
at com.oracle.truffle.polyglot.PolyglotContextImpl.enterThreadChanged(PolyglotContextImpl.java:829)
at com.oracle.truffle.polyglot.PolyglotEngineImpl.enterCached(PolyglotEngineImpl.java:2026)
at com.oracle.truffle.polyglot.HostToGuestRootNode.execute(HostToGuestRootNode.java:109)
at com.oracle.truffle.api.impl.DefaultCallTarget.callDirectOrIndirect(DefaultCallTarget.java:85)
at com.oracle.truffle.api.impl.DefaultCallTarget.call(DefaultCallTarget.java:102)
at com.oracle.truffle.polyglot.PolyglotObjectProxyHandler.invoke(PolyglotObjectProxyHandler.java:103)
at jdk.proxy2/jdk.proxy2.$Proxy157.apply(Unknown Source)
at org.apache.druid.server.router.JavaScriptTieredBrokerSelectorStrategy.getBrokerServiceName(JavaScriptTieredBrokerSelectorStrategy.java:59)
at org.apache.druid.server.router.TieredBrokerHostSelector.select(TieredBrokerHostSelector.java:196)
at org.apache.druid.server.router.QueryHostFinder.findServer(QueryHostFinder.java:57)
at org.apache.druid.server.router.QueryHostFinder.pickServer(QueryHostFinder.java:107)
at org.apache.druid.server.AsyncQueryForwardingServlet.service(AsyncQueryForwardingServlet.java:255)
It seems like GraalVM does not support multi-threaded access (it will error). I believe since Druid reuses the same JS engine/context across multiple threads, GraalVM will throw this error. This didn't seem to materialize in previous VM (Nashorn) as it actually is also not thread-safe, but it won't throw error (so won't fail query).
Activity
jtuglu1 commentedon Jul 15, 2025
Tagging @kgyrtkirk since I see you last updated this portion of the code