Session Identified by is unknown

Umer_Saeed · March 5, 2022, 9:41am

I am working on automating testcases for a mobile application in Python and I have recently started facing an issue. Thing were working completely fine earlier but now for some reason the following error pops up. Any idea on how to solve this issue?

selenium.common.exceptions.InvalidSessionIdException: Message: The session identified by 25030467-b3ad-4f74-a6ce-10f8ffab97c3 is not known
Stacktrace:
io.appium.uiautomator2.common.exceptions.NoSuchDriverException: The session identified by 25030467-b3ad-4f74-a6ce-10f8ffab97c3 is not known
at io.appium.uiautomator2.handler.request.SafeRequestHandler.handle(SafeRequestHandler.java:54)
at io.appium.uiautomator2.server.AppiumServlet.handleRequest(AppiumServlet.java:266)
at io.appium.uiautomator2.server.AppiumServlet.handleHttpRequest(AppiumServlet.java:260)
at io.appium.uiautomator2.http.ServerHandler.channelRead(ServerHandler.java:68)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:366)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:352)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:345)
at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:102)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:366)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:352)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:345)
at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:435)
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:293)
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:267)
at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:250)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:366)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:352)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:345)
at io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:266)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:366)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:352)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:345)
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1294)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:366)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:352)
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:911)
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:131)
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:611)
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:552)
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:466)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:438)
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:140)
at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:144)
at java.lang.Thread.run(Thread.java:920)

Solution: What you need to do is to uninstall uiautomator apps. Go to Android settings → Apps. Then search for uiautomator, 2 apps will pop up. Uninstall those and you’ll be good to go. This error occurs when the sessions crash over and over again so change your code in such a way that if it causes some error, it automatically quits the driver.

wreed · March 5, 2022, 5:29pm

Probably should post the code that produces the error. That would help a lot.

ido_oserovitz · March 9, 2022, 10:29am

Hi, it happened to me now for the second time.
I am testing both android and ios using mac. As well I am using one appium port.
I quit all the emulators/simulators I had open and any appium server as well.
Then, I relaunched the only simulator I wanted to use and an appium server and all worked fine again.
Hope it helps.

Additionally, I think it is an appium related issue since I saw somewhere in appium logs that it is intentionally switching sessions ids…

As well, maybe it is worth to try upload an issue in appium github repo and see there, or here as well.

Which appium version do you use? I updated lately and it didn’t happen to me before.

sm_test · April 27, 2022, 10:57am

@ido_oserovitz @Umer_Saeed
Could you please confirm how the issue got resolved? I’m seeing the same issue now

"Encountered internal error running command: io.appium.uiautomator2.common.exceptions.NoSuchDriverException: The session identified by 368fb888-8cf7-4701-927c-a1b9f2768cd7 is not known "

Umer_Saeed · April 28, 2022, 12:34am

What you need to do is to uninstall uiautomator apps. Go to Android settings -> Apps. Then search for uiautomator, 2 apps will pop up. Uninstall those and you’ll be good to go. This error occurs when the sessions crash over and over again so change your code in such a way that if it causes some error, it automatically quits the driver.

bengio_clark · May 5, 2022, 5:21am

Thanks @Umer_Saeed, your suggestion solve the issue.

To be specific, I uninstalled these two apps

io.appium.uiautomator2.server
io.appium.uiautomator2.server.test

ammar · May 13, 2022, 12:28pm

I use these commands to uninstall in such situations:

adb uninstall io.appium.uiautomator2.server
adb uninstall io.appium.uiautomator2.server.test
adb uninstall io.appium.unlock
adb uninstall io.appium.settings

Vivek_Shahir · July 4, 2022, 12:51pm

thanks Umer, really helpful .
it works

Kehinde_Adeoya · August 12, 2022, 12:28pm

Your contribution saved my day. I have troubleshooted for the past 8 hours.

Christian_Fortin · October 6, 2022, 3:32pm

How do I permanently uninstall them? I go into the emulator to uninstall and whenever I re-open the emulator they are back on the device.

Nisim_Naim · November 13, 2022, 9:39am

Once i removed these, Appium was able to launch the Android emulator, but it seems as if I can’t control it. I am unable to print the pageSource, unable to save a screenshot of the device.

mtv.tuanva · December 27, 2022, 4:16am

Thank you @Umer_Saeed. It works to me.

Chelsi_somani · May 25, 2023, 12:44pm

hey @Umer_Saeed lately I am working on automation scripts using YAML, R2
While starting session in appium- I am getting this error-
Encountered internal error running command: io.appium.uiautomator2.common.exceptions.NoSuchDriverException: The session identified by 97542aaa-f400-4677-b6f0-f89b0ef8a754 is not known

I can’t find uiautomator in Android settings -> Apps

Sanya_Begam · May 31, 2023, 12:10am

hi @ammar i’m very new to katalon can you pls say me where do i write these commands

S_Sharma · June 19, 2023, 5:31am

I could not find uiautomator apps in Android settings -> Apps but these commands worked for me Thanks.

Larissa_Cardoso · August 4, 2023, 6:08pm

it worked for me. Thank you very much.

Abdurashid_Jo_raboye · August 16, 2023, 6:26am

@Umer_Saeed worked thank you

prithvi_dheer · August 17, 2023, 9:30am

Thank you @Umer_Saeed. It works to me.

Anton_Ragozin1 · August 26, 2023, 3:30pm

I still dont get what causes that problem? how to prevent it? Will it be ever fixed by appium team?

Roman_Nejouta · September 7, 2023, 4:18am

Thank you @Umer_Saeed! This solution helped me and saved the hustle.