[BUG]: Healenium Proxy fails to establish session with Selenoid 1.11.3 — JsonException during /session call

[dkundu56]

Describe the bug

📝 Bug Description:

While integrating Healenium Proxy with Selenoid 1.11.3, the proxy fails to create a new WebDriver session.
We have observed that during the POST /session call, Healenium Proxy throws:

org.openqa.selenium.json.JsonException: Unable to parse: You are using Selenoid 1.11.3!

The error suggests that the proxy incorrectly attempts to parse Selenoid’s banner message (plain text) as a JSON response, resulting in a 500 Internal Server Error.

📋 Logs:

2025-04-28 08:59:28.159  WARN - Init Session: You are using Selenoid 1.11.3!
2025-04-28 08:59:28.209 ERROR - AbstractErrorWebExceptionHandler: 500 Server Error for HTTP POST "/session"
org.openqa.selenium.json.JsonException: Unable to parse: You are using Selenoid 1.11.3!

⚡ Impact:
• No WebDriver session can be initialized through Healenium Proxy.
• Healing functionality is completely blocked.
• Tests fail at driver instantiation

📈 Possible Root Cause:
• Healenium Proxy assumes that any HTTP 200 response from the Selenium backend is valid JSON.
• However, Selenoid v1.11.3 returns a plain text banner (You are using Selenoid 1.11.3!) on root /status and sometimes on initial connection, which causes JSON parsing failure.

healenium-proxy.log

How to reproduce the issue

Steps: 
1. cd healenium
2. docker-compose -f docker-compose-selenoid.yaml up -d
3. python -m pytest ./tests/test_xpath.py

hlm-proxy logs:

2025-04-28 08:58:26.440  INFO 1 - [       main] .e.h.h.HealeniumProxyApplication : Started HealeniumProxyApplication in 6.116 seconds (process running for 7.739) 
2025-04-28 08:59:28.159  WARN 1 - [ttp-epoll-2] .InitSessionGatewayFilterFactory : Init Session: You are using Selenoid 1.11.3! 
2025-04-28 08:59:28.165  INFO 1 - [ttp-epoll-2] healenium                        : [Proxy] Using Selenium server: http://selenoid:4444/wd/hub 
2025-04-28 08:59:28.209 ERROR 1 - [ttp-epoll-2] AbstractErrorWebExceptionHandler : [f1d5e581-1]  500 Server Error for HTTP POST "/session" org.openqa.selenium.json.JsonException: Unable to parse: You are using Selenoid 1.11.3!\n

Logs appeared during using Healenium

Proxy Logs:

2025-04-28 08:58:26.440  INFO 1 - [       main] .e.h.h.HealeniumProxyApplication : Started HealeniumProxyApplication in 6.116 seconds (process running for 7.739) 
2025-04-28 08:59:28.159  WARN 1 - [ttp-epoll-2] .InitSessionGatewayFilterFactory : Init Session: You are using Selenoid 1.11.3! 
2025-04-28 08:59:28.165  INFO 1 - [ttp-epoll-2] healenium                        : [Proxy] Using Selenium server: http://selenoid:4444/wd/hub 
2025-04-28 08:59:28.209 ERROR 1 - [ttp-epoll-2] AbstractErrorWebExceptionHandler : [f1d5e581-1]  500 Server Error for HTTP POST "/session" org.openqa.selenium.json.JsonException: Unable to parse: You are using Selenoid 1.11.3!\n 	at org.openqa.selenium.json.Json.toType(Json.java:169)\n 	Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException: \n Error has been observed at the following site(s):\n 	*__checkpoint ⇢ org.springframework.cloud.gateway.filter.WeightCalculatorWebFilter [DefaultWebFilterChain]\n 	*__checkpoint ⇢ HTTP POST "/session" [ExceptionHandlingWebHandler]\n Original Stack Trace:\n 		at org.openqa.selenium.json.Json.toType(Json.java:169)\n 		at org.openqa.selenium.json.Json.toType(Json.java:152)\n 		at com.epam.healenium.healenium_proxy.mapper.JsonMapper.getValue(JsonMapper.java:63)\n 		at com.epam.healenium.healenium_proxy.service.SessionContextService.enrichSessionContext(SessionContextService.java:76)\n 		at com.epam.healenium.healenium_proxy.service.SessionContextService.submitSessionContext(SessionContextService.java:70)\n 		at com.epam.healenium.healenium_proxy.filter.InitSessionGatewayFilterFactory.lambda$apply$0(InitSessionGatewayFilterFactory.java:31)\n 		at org.springframework.cloud.gateway.filter.factory.rewrite.ModifyResponseBodyGatewayFilterFactory$ModifiedServerHttpResponse.lambda$writeWith$0(ModifyResponseBodyGatewayFilterFactory.java:224)\n 		at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:132)\n 		at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:129)\n 		at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onNext(FluxContextWrite.java:107)\n 		at reactor.core.publisher.FluxMapFuseable$MapFuseableConditionalSubscriber.onNext(FluxMapFuseable.java:299)\n 		at reactor.core.publisher.FluxFilterFuseable$FilterFuseableConditionalSubscriber.onNext(FluxFilterFuseable.java:337)\n 		at reactor.core.publisher.Operators$BaseFluxToMonoOperator.completePossiblyEmpty(Operators.java:2097)\n 		at reactor.core.publisher.MonoCollect$CollectSubscriber.onComplete(MonoCollect.java:145)\n 		at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:144)\n 		at reactor.core.publisher.FluxPeek$PeekSubscriber.onComplete(FluxPeek.java:260)\n 		at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:144)\n 		at reactor.netty.channel.FluxReceive.onInboundComplete(FluxReceive.java:415)\n 		at reactor.netty.channel.ChannelOperations.onInboundComplete(ChannelOperations.java:445)\n 		at reactor.netty.channel.ChannelOperations.terminate(ChannelOperations.java:499)\n 		at reactor.netty.http.client.HttpClientOperations.onInboundNext(HttpClientOperations.java:800)\n 		at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:115)\n 		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)\n 		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)\n 		at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)\n 		at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436)\n 		at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346)\n 		at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:318)\n 		at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251)\n 		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442)\n 		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)\n 		at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)\n 		at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1407)\n 		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)\n 		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)\n 		at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:918)\n 		at io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:799)\n 		at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:501)\n 		at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:399)\n 		at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:994)\n 		at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)\n 		at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)\n 		at java.base/java.lang.Thread.run(Thread.java:1570)\n Caused by: org.openqa.selenium.json.JsonException: Unable to determine type from: Y. Last 1 characters read: Y, next 29 characters to read: ou are using Selenoid 1.11.3!\n Build info: version: '4.25.0', revision: '8a8aea2337'\n System info: os.name: 'Linux', os.arch: 'amd64', os.version: '6.10.14-linuxkit', java.version: '22.0.2'\n Driver info: driver.version: unknown\n 	at org.openqa.selenium.json.JsonInput.peek(JsonInput.java:166)\n 	at org.openqa.selenium.json.JsonTypeCoercer.lambda$buildCoercer$6(JsonTypeCoercer.java:167)\n 	at org.openqa.selenium.json.JsonTypeCoercer.coerce(JsonTypeCoercer.java:146)\n 	at org.openqa.selenium.json.Json.toType(Json.java:206)\n 	at org.openqa.selenium.json.Json.toType(Json.java:167)\n 	at org.openqa.selenium.json.Json.toType(Json.java:152)\n 	at com.epam.healenium.healenium_proxy.mapper.JsonMapper.getValue(JsonMapper.java:63)\n 	at com.epam.healenium.healenium_proxy.service.SessionContextService.enrichSessionContext(SessionContextService.java:76)\n 	at com.epam.healenium.healenium_proxy.service.SessionContextService.submitSessionContext(SessionContextService.java:70)\n 	at com.epam.healenium.healenium_proxy.filter.InitSessionGatewayFilterFactory.lambda$apply$0(InitSessionGatewayFilterFactory.java:31)\n 	at org.springframework.cloud.gateway.filter.factory.rewrite.ModifyResponseBodyGatewayFilterFactory$ModifiedServerHttpResponse.lambda$writeWith$0(ModifyResponseBodyGatewayFilterFactory.java:224)\n 	at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:132)\n 	at reactor.core.publisher.FluxOnAssembly$OnAssemblySubscriber.onNext(FluxOnAssembly.java:539)\n 	at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:129)\n 	at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onNext(FluxContextWrite.java:107)\n 	at reactor.core.publisher.FluxMapFuseable$MapFuseableConditionalSubscriber.onNext(FluxMapFuseable.java:299)\n 	at reactor.core.publisher.FluxFilterFuseable$FilterFuseableConditionalSubscriber.onNext(FluxFilterFuseable.java:337)\n 	at reactor.core.publisher.Operators$BaseFluxToMonoOperator.completePossiblyEmpty(Operators.java:2097)\n 	at reactor.core.publisher.MonoCollect$CollectSubscriber.onComplete(MonoCollect.java:145)\n 	at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:144)\n 	at reactor.core.publisher.FluxPeek$PeekSubscriber.onComplete(FluxPeek.java:260)\n 	at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:144)\n 	at reactor.netty.channel.FluxReceive.onInboundComplete(FluxReceive.java:415)\n 	at reactor.netty.channel.ChannelOperations.onInboundComplete(ChannelOperations.java:445)\n 	at reactor.netty.channel.ChannelOperations.terminate(ChannelOperations.java:499)\n 	at reactor.netty.http.client.HttpClientOperations.onInboundNext(HttpClientOperations.java:800)\n 	at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:115)\n 	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)\n 	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)\n 	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)\n 	at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436)\n 	at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346)\n 	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:318)\n 	at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251)\n 	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442)\n 	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)\n 	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)\n 	at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1407)\n 	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)\n 	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)\n 	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:918)\n 	at io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:799)\n 	at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:501)\n 	at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:399)\n 	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:994)\n 	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)\n 	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)\n 	at java.base/java.lang.Thread.run(Thread.java:1570)\n

Expected behavior

No response

Actual behavior

No response

Healenium Proxy version

2.1.1

Healenium Backend version

3.4.6

Selenium version

No response

Additional context

No response