Blocking IO in Forwarder?

[hiddenalpha]

IMHO 225ms is quite a long time for an async operation. Is there some unexpected blocking IO happening?

2024-06-14T15:52:56,390 int houston WARN BlockedThreadChecker - Thread Thread[vert.x-eventloop-thread-0,5,main] has been blocked for 225 ms, time limit is 8 ms
io.vertx.core.VertxException: Thread blocked
	at io.netty.handler.codec.DefaultHeaders.get(DefaultHeaders.java:154) ~[netty-codec-4.1.103.Final.jar:4.1.103.Final]
	at io.netty.handler.codec.DefaultHeaders.contains(DefaultHeaders.java:229) ~[netty-codec-4.1.103.Final.jar:4.1.103.Final]
	at io.netty.handler.codec.http.DefaultHttpHeaders.contains(DefaultHttpHeaders.java:371) ~[netty-codec-http-4.1.103.Final.jar:4.1.103.Final]
	at io.vertx.core.http.impl.Http1xClientConnection.createRequest(Http1xClientConnection.java:184) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.http.impl.Http1xClientConnection.beginRequest(Http1xClientConnection.java:231) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.http.impl.Http1xClientConnection.access$700(Http1xClientConnection.java:73) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.http.impl.Http1xClientConnection$StreamImpl.writeHead(Http1xClientConnection.java:529) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.http.impl.Http1xClientConnection$StreamImpl.writeHead(Http1xClientConnection.java:522) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.http.impl.HttpClientRequestImpl.doWrite(HttpClientRequestImpl.java:522) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.http.impl.HttpClientRequestImpl.write(HttpClientRequestImpl.java:492) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.http.impl.HttpClientRequestImpl.write(HttpClientRequestImpl.java:451) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.http.impl.HttpClientRequestImpl.write(HttpClientRequestImpl.java:444) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.http.impl.HttpClientRequestImpl.write(HttpClientRequestImpl.java:44) ~[vertx-core-4.5.1.jar:4.5.1]
	at org.swisspush.gateleen.routing.Forwarder$1$1.write(Forwarder.java:331) ~[gateleen-routing-2.1.8.jar:?]
	at org.swisspush.gateleen.routing.Forwarder$1$1.write(Forwarder.java:336) ~[gateleen-routing-2.1.8.jar:?]
	at org.swisspush.gateleen.routing.Forwarder$1$1.write(Forwarder.java:314) ~[gateleen-routing-2.1.8.jar:?]
	at org.swisspush.gateleen.logging.LoggingWriteStream.write(LoggingWriteStream.java:50) ~[gateleen-logging-2.1.8.jar:?]
	at org.swisspush.gateleen.logging.LoggingWriteStream.write(LoggingWriteStream.java:41) ~[gateleen-logging-2.1.8.jar:?]
	at org.swisspush.gateleen.logging.LoggingWriteStream.write(LoggingWriteStream.java:14) ~[gateleen-logging-2.1.8.jar:?]
	at io.vertx.core.streams.impl.PumpImpl.lambda$new$1(PumpImpl.java:63) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.streams.impl.PumpImpl$$Lambda$572/0x0000000840528440.handle(Unknown Source) ~[?:?]
	at org.swisspush.gateleen.core.http.BufferBridge.lambda$pump$0(BufferBridge.java:38) ~[gateleen-core-2.1.8.jar:?]
	at org.swisspush.gateleen.core.http.BufferBridge$$Lambda$1556/0x0000000840793040.handle(Unknown Source) ~[?:?]
	at io.vertx.core.impl.ContextInternal.dispatch(ContextInternal.java:276) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.impl.ContextInternal.dispatch(ContextInternal.java:258) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.impl.ContextInternal.lambda$runOnContext$0(ContextInternal.java:56) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.impl.ContextInternal$$Lambda$263/0x000000084039c040.run(Unknown Source) ~[?:?]
	at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:173) ~[netty-common-4.1.103.Final.jar:4.1.103.Final]
	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:166) ~[netty-common-4.1.103.Final.jar:4.1.103.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:470) ~[netty-common-4.1.103.Final.jar:4.1.103.Final]
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:566) ~[netty-transport-4.1.103.Final.jar:4.1.103.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997) ~[netty-common-4.1.103.Final.jar:4.1.103.Final]
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.103.Final.jar:4.1.103.Final]
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.103.Final.jar:4.1.103.Final]
	at java.lang.Thread.run(Thread.java:829) ~[?:?]