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

[Prasanna Pujar]

i am getting above exception randomly 

I am using Firefox 45.0.2 and Selenium 2.53.0 

Below is stack trace 

can somebody help in solving this issue ? 

Thank you.

FAILED: testmer("firefox", "http://home.bersin.com/", "bersinone")

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

Build info: version: '2.53.0', revision: '35ae25b1534ae328c771e0856c93e187490ca824', time: '2016-03-15 10:43:46'

System info: host: 'USBLRPRPUJAR8', ip: '10.17.206.171', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '1.8.0_72'

Driver info: driver.version: RemoteWebDriver

Capabilities [{applicationCacheEnabled=true, rotatable=false, handlesAlerts=true, databaseEnabled=true, version=45.0.1, platform=WINDOWS, nativeEvents=false, acceptSslCerts=true, webStorageEnabled=true, locationContextEnabled=true, browserName=firefox, takesScreenshot=true, javascriptEnabled=true, cssSelectorsEnabled=true}]

Session ID: f168ee39-ef19-4366-8066-9dd44f16a3b1

at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:665)

at org.openqa.selenium.remote.RemoteWebElement.execute(RemoteWebElement.java:327)

at org.openqa.selenium.remote.RemoteWebElement.getAttribute(RemoteWebElement.java:150)

at org.openqa.selenium.support.ui.Select.<init>(Select.java:52)

at com.bersin.reports.Merpage.select_Latest_contract(Merpage.java:133)

at com.bersin.mis.MerTest2.testmer(MerTest2.java:62)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:85)

at org.testng.internal.Invoker.invokeMethod(Invoker.java:639)

at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:816)

at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1124)

at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:125)

at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:108)

at org.testng.TestRunner.privateRun(TestRunner.java:774)

at org.testng.TestRunner.run(TestRunner.java:624)

at org.testng.SuiteRunner.runTest(SuiteRunner.java:359)

at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:354)

at org.testng.SuiteRunner.privateRun(SuiteRunner.java:312)

at org.testng.SuiteRunner.run(SuiteRunner.java:261)

at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)

at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)

at org.testng.TestNG.runSuitesSequentially(TestNG.java:1191)

at org.testng.TestNG.runSuitesLocally(TestNG.java:1116)

at org.testng.TestNG.run(TestNG.java:1024)

at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:126)

at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:137)

at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:58)

Caused by: org.apache.http.ConnectionClosedException: Premature end of Content-Length delimited message body (expected: 105; received: 0

at org.apache.http.impl.io.ContentLengthInputStream.read(ContentLengthInputStream.java:180)

at org.apache.http.impl.io.ContentLengthInputStream.read(ContentLengthInputStream.java:200)

at org.apache.http.impl.io.ContentLengthInputStream.close(ContentLengthInputStream.java:103)

at org.apache.http.impl.execchain.ResponseEntityProxy.streamClosed(ResponseEntityProxy.java:140)

at org.apache.http.conn.EofSensorInputStream.checkClose(EofSensorInputStream.java:228)

at org.apache.http.conn.EofSensorInputStream.close(EofSensorInputStream.java:174)

at org.apache.http.util.EntityUtils.consume(EntityUtils.java:88)

at org.openqa.selenium.remote.internal.ApacheHttpClient.createResponse(ApacheHttpClient.java:113)

at org.openqa.selenium.remote.internal.ApacheHttpClient.execute(ApacheHttpClient.java:94)

at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:142)

at org.openqa.selenium.firefox.internal.NewProfileExtensionConnection.execute(NewProfileExtensionConnection.java:160)

at org.openqa.selenium.firefox.FirefoxDriver$LazyCommandExecutor.execute(FirefoxDriver.java:380)

at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:644)

... 29 more

[darrell grainger]

Selenium 2.53.0 was released March 15, 2016. Firefox 45.0.2 was release April 11, 2016. I have found that the version of Selenium which works best with Firefox is the version of Selenium release AFTER the release date of Firefox.

Selenium 2.53.1 was release June 30, 2016. This is probably the version of Selenium you should be using with Firefox 45.0.2.