UnreachableBrowserException: Error communicating with the remote browser. It may have died

[v3g3t4x]

Hi, I am using Selenoid 1.10.3 Java client 3.14.0 JVM 1.8 Tested on Chrome 62,77,90

Daily I run hundred parallel test without issues invoking with remotedriver my test on a selenoid remote grid. Sometimes my application raise this error: org.openqa.selenium.remote.UnreachableBrowserException: Error communicating with the remote browser. It may have died And Caused by: java.net.SocketException: Connection timed out (Read failed)

This issue occurs when I invoke this part of code (but sometimes not always): JavascriptExecutor javascript = (JavascriptExecutor) this.localDriver; statusValue = (String) javascript.executeScript("return document.readyState"); log.info("Status javascript:" + statusValue);

Seems an hang on network level when execute javascript.executeScript("return document.readyState"); After 10 minutes it raise the exception below and after the test continue without problem because the container is not died. In the meanwhile during the 10 minute if I send a get/post request with postman to selenoid for that session for example to retrieve screenshot, works fine.

FULL STACK: org.openqa.selenium.remote.UnreachableBrowserException: Error communicating with the remote browser. It may have died. Build info: version: '3.14.0', revision: 'aacccce0', time: '2018-08-02T20:19:58.91Z' System info: host: 'atfprocessor-163-pqg9s', ip: '10.252.53.245', os.name: 'Linux', os.arch: 'amd64', os.version: '3.10.0-1062.1.2.el7.x86_64', java.version: '1.8.0_242' Driver info: driver.version: RemoteWebDriver Capabilities {acceptInsecureCerts: false, acceptSslCerts: false, applicationCacheEnabled: false, browserConnectionEnabled: false, browserName: chrome, chrome: {chromedriverVersion: 77.0.3865.40 (f484704e052e0..., userDataDir: /tmp/.com.google.Chrome.QvDEQY}, cssSelectorsEnabled: true, databaseEnabled: false, goog:chromeOptions: {debuggerAddress: localhost:38756}, handlesAlerts: true, hasTouchScreen: false, javascriptEnabled: true, locationContextEnabled: true, mobileEmulationEnabled: false, nativeEvents: true, networkConnectionEnabled: false, pageLoadStrategy: normal, platform: LINUX, platformName: LINUX, proxy: Proxy(), rotatable: false, setWindowRect: true, strictFileInteractability: false, takesHeapSnapshot: true, takesScreenshot: true, timeouts: {implicit: 0, pageLoad: 300000, script: 30000}, unexpectedAlertBehaviour: ignore, unhandledPromptBehavior: ignore, version: 77.0.3865.75, webStorageEnabled: true} Session ID: e2d9d9628c43d72234fa4ad6a0e95874 at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:569) ~[selenium-remote-driver-3.14.0.jar:?] at org.openqa.selenium.remote.RemoteWebDriver.executeScript(RemoteWebDriver.java:485) ~[selenium-remote-driver-3.14.0.jar:?] and after as latest exception: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[?:1.8.0_242] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[?:1.8.0_242] at java.lang.Thread.run(Thread.java:748) [?:1.8.0_242] Caused by: java.net.SocketException: Connection timed out (Read failed) at java.net.SocketInputStream.socketRead0(Native Method) ~[?:1.8.0_242] at java.net.SocketInputStream.socketRead(SocketInputStream.java:116) ~[?:1.8.0_242] at java.net.SocketInputStream.read(SocketInputStream.java:171) ~[?:1.8.0_242] at java.net.SocketInputStream.read(SocketInputStream.java:141) ~[?:1.8.0_242] at org.apache.http.impl.io.SessionInputBufferImpl.streamRead(SessionInputBufferImpl.java:137) ~[httpcore-4.4.6.jar:4.4.6] at org.apache.http.impl.io.SessionInputBufferImpl.fillBuffer(SessionInputBufferImpl.java:153) ~[httpcore-4.4.6.jar:4.4.6] at org.apache.http.impl.io.SessionInputBufferImpl.readLine(SessionInputBufferImpl.java:282) ~[httpcore-4.4.6.jar:4.4.6] at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:138) ~[httpclient-4.5.3.jar:4.5.3] at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:56) ~[httpclient-4.5.3.jar:4.5.3] at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:259) ~[httpcore-4.4.6.jar:4.4.6] at org.apache.http.impl.DefaultBHttpClientConnection.receiveResponseHeader(DefaultBHttpClientConnection.java:163) ~[httpcore-4.4.6.jar:4.4.6] at org.apache.http.impl.conn.CPoolProxy.receiveResponseHeader(CPoolProxy.java:165) ~[httpclient-4.5.3.jar:4.5.3] at org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:273) ~[httpcore-4.4.6.jar:4.4.6] at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:125) ~[httpcore-4.4.6.jar:4.4.6] at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:272) ~[httpclient-4.5.3.jar:4.5.3] at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:185) ~[httpclient-4.5.3.jar:4.5.3] at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89) ~[httpclient-4.5.3.jar:4.5.3] at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:111) ~[httpclient-4.5.3.jar:4.5.3] at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185) ~[httpclient-4.5.3.jar:4.5.3] at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:72) ~[httpclient-4.5.3.jar:4.5.3] at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:56) ~[httpclient-4.5.3.jar:4.5.3] at org.openqa.selenium.remote.internal.ApacheHttpClient.fallBackExecute(ApacheHttpClient.java:155) ~[selenium-remote-driver-3.14.0.jar:?] at org.openqa.selenium.remote.internal.ApacheHttpClient.execute(ApacheHttpClient.java:97) ~[selenium-remote-driver-3.14.0.jar:?] at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:155) ~[selenium-remote-driver-3.14.0.jar:?] at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:548) ~[selenium-remote-driver-3.14.0.jar:?] ... 12 more

[vania-pooh]

@v3g3t4x probably you are just overloading your instance. Try to lower parallel execution limit.

[v3g3t4x]

@v3g3t4x probably you are just overloading your instance. Try to lower parallel execution limit.

No this happen with 1 test only and with 8 in parallel is the same. I can add another info. This seems happen with one site only. What can cause this behavior in a web site? For all test in other website all works fine but if I navigate in this CRM site the hang happen. But during the hang if I invoke an executescript or a screenshot with postman via api on the same selenoid with same session selenoid respond without issue but test case is in hang.

[vania-pooh]

@v3g3t4x probably your browser is just crashing. Try to increase shmSize parameter in browsers.json. https://aerokube.com/selenoid/latest/#_other_optional_fields

[v3g3t4x]

But test after 10 min of hang continue to work on the same selenoid.Browser is up and running

[vania-pooh]

@v3g3t4x anyway take a look at system metrics of your host machine. Probably disk is overloaded.

[v3g3t4x]

In this case, why if I invoke a single request via postman respond without issue?

[vania-pooh]

@v3g3t4x every Selenium session consists of dozens of such requests. Every action is a separate HTTP request.

[v3g3t4x]

@v3g3t4x every Selenium session consists of dozens of such requests. Every action is a separate HTTP request.

I know, restarted server and all selenoid node. Error occurs...no resource issue

[vania-pooh]

@v3g3t4x also make sure you have recent Docker version.

[v3g3t4x]

@v3g3t4x also make sure you have recent Docker version.

But works 99% of times..I don't think is related to a docker issue

[vania-pooh]

@v3g3t4x anyway we need more diagnostics from your side. Could also be a firewall issue where some resource is not loading completely.

[github-actions[bot]]

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