Hi Thomas, thanks for the reply. When you say "which leads to some
component responding with a plain HTML error page instead of the
expected JSON documen"" are you talking about the communication
between the hub and node or the browser itself? Unfortunately Geb does
not take a screenshot on this kind of failure so I am never able to
see what the browser is showing. I did put together an event listener
with the help of stack overflow to execute something if a test fails,
so I'll see if I can print the page source or something.
The nodes get restarted every morning. I am not sure if restarting
after each test run will be feasible since this grid is shared by
another team. Is there away to tell nodes to restart after some
activity or something?
On Friday, September 11, 2020 at 11:09:12 AM UTC-5 [email protected]
wrote:
Hello jc,
the stacktrace seems to indicate that there is HTML being returned
where
JSON is expected.
The "<" character is most commonly found as the first character in
any
HTML document.
The "type" that is mentioned in the message is one of "JsonArray" or
"JsonObject", starting with "[" and "{" respectively.
It would be helpful to see the full response, and not only the first
character, but that might not be easy to do, as the error itself is
probably
happening on a low level in the communication between the components
of
the Grid.
To further investigate this, you might want to look at logfiles
written
by Grid components, but right now I don't know where or if there are
any.
I am guessing that there is some kind of resource leak inside the
Grid,
which leads to some component responding with a plain HTML error
page,
instead of the expected JSON document.
As a first attempt to circumvent this problem I would suggest to
restart
the whole Grid between the test runs for different resolutions.
Thomas
Am 11.09.2020 00:37 schrieb jc:
Here is the stack trace of the one that failed on the locator
Unable to determine type from: <. Last 1 characters read: <
Build info: version: '3.141.59', revision: 'e82be7d358', time:
'2018-11-14T08:17:03'
System info: host: 'redacted.corporate.redacted.com [1]', ip:
'192.168.1.15', os.name [2]: 'Mac OS X', os.arch: 'x86_64',
os.version:
'10.14.6', java.version: '11.0.4'
Driver info: driver.version: RemoteWebDriver
org.openqa.selenium.json.JsonException: Unable to determine type
from:
<. Last 1 characters read: <
Build info: version: '3.141.59', revision: 'e82be7d358', time:
'2018-11-14T08:17:03'
System info: host: 'redacted.corporate.redacted.com [1]', ip:
'192.168.1.15', os.name [2]: 'Mac OS X', os.arch: 'x86_64',
os.version:
'10.14.6', java.version: '11.0.4'
Driver info: driver.version: RemoteWebDriver
at org.openqa.selenium.json.JsonInput.peek(JsonInput.java:122)
at
org.openqa.selenium.json.JsonTypeCoercer.lambda$null$6(JsonTypeCoercer.java:140)
at
org.openqa.selenium.json.JsonTypeCoercer.coerce(JsonTypeCoercer.java:126)
at org.openqa.selenium.json.Json.toType(Json.java:69)
at org.openqa.selenium.json.Json.toType(Json.java:55)
at org.openqa.selenium.json.Json.toType(Json.java:50)
at
org.openqa.selenium.remote.http.W3CHttpResponseCodec.decode(W3CHttpResponseCodec.java:87)
at
org.openqa.selenium.remote.http.W3CHttpResponseCodec.decode(W3CHttpResponseCodec.java:49)
at
org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:158)
at
org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:552)
at
org.openqa.selenium.remote.RemoteWebDriver.findElements(RemoteWebDriver.java:353)
at
org.openqa.selenium.remote.RemoteWebDriver.findElementsByCssSelector(RemoteWebDriver.java:424)
at org.openqa.selenium.By
[3]$ByCssSelector.findElements(By.java:441)
at
org.openqa.selenium.remote.RemoteWebDriver.findElements(RemoteWebDriver.java:311)
at
geb.navigator.SearchContextBasedBasicLocator.elementsSupplier_closure8$_closure12(SearchContextBasedBasicLocator.groovy:199)
at groovy.lang.Closure.call(Closure.java:405)
at groovy.lang.Closure.call(Closure.java:421)
at
geb.navigator.SearchContextBasedBasicLocator.elementsSupplier_closure8(SearchContextBasedBasicLocator.groovy:199)
at groovy.lang.Closure.call(Closure.java:405)
at
geb.navigator.SearchContextBasedBasicLocator.toNavigator(SearchContextBasedBasicLocator.groovy:223)
at
geb.navigator.SearchContextBasedBasicLocator.find(SearchContextBasedBasicLocator.groovy:186)
at
geb.navigator.SearchContextBasedBasicLocator.find(SearchContextBasedBasicLocator.groovy:55)
at geb.navigator.DefaultLocator.find(DefaultLocator.groovy:22)
at geb.navigator.DefaultLocator.find(DefaultLocator.groovy:31)
at geb.content.NavigableSupport.$(NavigableSupport.groovy:65)
at
geb.content.PageContentTemplateFactoryDelegate.$(PageContentTemplateFactoryDelegate.groovy:27)
at
geb.pages.EnrollmentStartPage._clinit__closure6$_closure8(EnrollmentStartPage.groovy:16)
at
geb.pages.EnrollmentStartPage._clinit__closure6$_closure8(EnrollmentStartPage.groovy)
at
geb.content.PageContentTemplate.invokeFactory(PageContentTemplate.groovy:102)
at
geb.content.PageContentTemplate.create_closure1(PageContentTemplate.groovy:59)
at
geb.content.PageContentTemplate.create_closure1(PageContentTemplate.groovy)
at
geb.content.PageContentTemplate.create(PageContentTemplate.groovy:87)
at
geb.content.PageContentTemplate.get(PageContentTemplate.groovy:54)
at
geb.content.DefaultPageContentSupport.getContent(DefaultPageContentSupport.groovy:42)
at
geb.content.PageContentSupport.propertyMissing(PageContentSupport.groovy:41)
at geb.Page.propertyMissing(Page.groovy:110)
at
geb.pages.EnrollmentStartPage.enterCoverageEffectiveDate(EnrollmentStartPage.groovy:107)
at geb.tests.ApplicantInformationPageTest.Applicant Information:
information is saved when proceeding and coming back to
page(ApplicantInformationPageTest.groovy:707)
On Thursday, September 10, 2020 at 5:36:05 PM UTC-5 jc wrote:
I am not sure if this is a Geb issue but hoping maybe the smart
people here could maybe help understand why I occasionally see
this
error. We have a test suite of about 650 test cases that run 4
times overnight for different resolutions. So that is about 2200
tests per night. I will have occasional failures, usually 1 or 2,
with this exception:
Unable to determine type from: <. Last 1 characters read: <
Build info: version: '3.141.59', revision: 'e82be7d358', time:
'2018-11-14T08:17:03'
System info: host: 'redacted.corporate.redacted.com [1] [1]', ip:
'192.168.1.15', os.name [2] [2]: 'Mac OS X', os.arch: 'x86_64',
os.version: '10.14.6', java.version: '11.0.4'
Driver info: driver.version: RemoteWebDriver
org.openqa.selenium.json.JsonException: Unable to determine type
from: <. Last 1 characters read: <
Build info: version: '3.141.59', revision: 'e82be7d358', time:
'2018-11-14T08:17:03'
System info: host: 'redacted.corporate.redacted.com [1] [1]', ip:
'192.168.1.15', os.name [2] [2]: 'Mac OS X', os.arch: 'x86_64',
os.version: '10.14.6', java.version: '11.0.4'
Driver info: driver.version: RemoteWebDriver
at org.openqa.selenium.json.JsonInput.peek(JsonInput.java:122)
at
org.openqa.selenium.json.JsonTypeCoercer.lambda$null$6(JsonTypeCoercer.java:140)
at
org.openqa.selenium.json.JsonTypeCoercer.coerce(JsonTypeCoercer.java:126)
at org.openqa.selenium.json.Json.toType(Json.java:69)
at org.openqa.selenium.json.Json.toType(Json.java:55)
at org.openqa.selenium.json.Json.toType(Json.java:50)
at
org.openqa.selenium.remote.http.W3CHttpResponseCodec.decode(W3CHttpResponseCodec.java:87)
at
org.openqa.selenium.remote.http.W3CHttpResponseCodec.decode(W3CHttpResponseCodec.java:49)
at
org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:158)
at
org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:552)
at
org.openqa.selenium.remote.RemoteWebDriver.get(RemoteWebDriver.java:277)
at geb.Browser.go(Browser.groovy:533)
at geb.Browser.go(Browser.groovy:510)
at geb.spock.GebSpec.methodMissing(GebSpec.groovy:60)
at geb.BaseTest.cleanup(BaseTest.groovy:71)
In my last case I had this happen twice. The first when trying to
click an element. IntelliJ said this is the offending line of
code:
pageHeader {$("div h3")[0]}
which is the first item inside a static content block on a page.
The second one the offending line was the end bracket "}" of an
if
statement.
Versions of everything being used:
Grid: 3.141.59
org.seleniumhq.selenium:selenium-remote-driver:3.141.59
org.seleniumhq.selenium:selenium-server:3.141.59
org.codehaus.groovy:groovy-all:2.5.8
org.spockframework:spock-core:1.3-groovy-2.5
org.gebish:geb-spock:3.4
The remote driver is not being invoked in any obscure way:
remoteDriver = new RemoteWebDriver(URI.create(hubUrl).toURL(),
capabilities)
When this happens it's usually in the middle of a test class
where
several tests before it have passed with no issues using the very
same code.
Things I know:
* It only happens when running on the grid aka with
RemoteWebDriver. I have never seen it happen locally.
* It happens once about every 2200 tests.
* It's never the same test, same method, or same action.
* It happens on both Chrome and Firefox (unsure about other
browsers).
* The message is always "Unable to determine type from: <. Last 1
characters read: <"
It almost seems as if there is a sync issue somewhere Geb or
WebDriver or something.. I am unsure how 1500+ test cases can
pass
and then all of the sudden encounter this error.
I would gladly provide any help I can. Unfortunately I cannot
hand
out this code for anyone to test and I don't even know what kind
of
example project I could throw together to even attempt to try to
reproduce this. I am hoping the stack trace will help someone
identify something.
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