The best way I have found to close Chrome so that it has as few problems as possible is to click the three dots at the top right and then click "Exit" near the bottom of the context menu that pops up. I started doing this with MS Edge as well. It seems that using CTRL+SHIFT+W and clicking the Close button on the window and the Terminate action in Blue Prism etc. etc. do not close Chrome as fully as using the method I'm referring to.
What we did was build a reusable object/action that we call "Close MS Edge Gracefully" in order to close Edge...well...gracefully, and it uses the same technique as the screenshots show below except in Edge. You could use a reusable action like that in all of your processes to ensure that Chrome or whatever browser is closed correctly at the end. I would personally avoid using Kill Process except as a last resort in a retry loop.
Screenshots:
I see that others have already suggested considering whether Fixed Port mode is your issue or not. I've spent an obscene amount of time troubleshooting Chrome and MS Edge Browser Extension issues. I've posted on a bunch of other threads regarding my thoughts on things to try. I'm assuming you've already read through some of those threads. But, in any case, here's some quick thoughts.
First, I agree with Daniel that now Browser Connectivity issues with Fixed Port Mode are usually due to someone switching back and forth on the same machine between running in Control Room and running in DEBUG mode (having Process/Object Studio open).
Second, I think it is important to note that while Blue Prism's browser automation has gotten significantly more stable over the last year or so, I've seen some environments just have issues with it such as you're describing. From what I've found, v6.10.1 and v7.0 are both very stable, and I just plain cannot get v7.0 to fail in browser mode at all so it seems quite stable at least from my local Blue Prism environment. So, something you could always consider is setting up a Test environment where you install a newer version of Blue Prism and runs some tests there with your automations to see if you still encounter the same issues.
Third, you could always consider trying to turn off Fixed Port Mode. I seem to always visit the Community in the evening when I'm tired so I may have overlooked this being discussed already in this thread. =) If you tried Ephemeral Port Mode, you would potentially find that browser automation would fail less often if at all. However, note that Fixed Port Mode and Ephemeral Port Mode do not function the same in all scenarios, especially when it comes to development and such. There's limitations to both. Anyway, we're all here for you if you decided to try out that route and can give some suggestions.
Last, I cannot be sure of this and it might just be superstition talking, but I tend to like using only a specific browser per machine if possible. So, if you're using Chrome and Edge and Firefox or just two of them on the same machine, I'd recommend using just one of them if you can, and then if you pair that with closing Chrome the way I suggested above, I think you'll have fewer issues.
------------------------------
Dave Morris
Cano Ai
Atlanta, GA
------------------------------
What we did was build a reusable object/action that we call "Close MS Edge Gracefully" in order to close Edge...well...gracefully, and it uses the same technique as the screenshots show below except in Edge. You could use a reusable action like that in all of your processes to ensure that Chrome or whatever browser is closed correctly at the end. I would personally avoid using Kill Process except as a last resort in a retry loop.
Screenshots:
I see that others have already suggested considering whether Fixed Port mode is your issue or not. I've spent an obscene amount of time troubleshooting Chrome and MS Edge Browser Extension issues. I've posted on a bunch of other threads regarding my thoughts on things to try. I'm assuming you've already read through some of those threads. But, in any case, here's some quick thoughts.
First, I agree with Daniel that now Browser Connectivity issues with Fixed Port Mode are usually due to someone switching back and forth on the same machine between running in Control Room and running in DEBUG mode (having Process/Object Studio open).
Second, I think it is important to note that while Blue Prism's browser automation has gotten significantly more stable over the last year or so, I've seen some environments just have issues with it such as you're describing. From what I've found, v6.10.1 and v7.0 are both very stable, and I just plain cannot get v7.0 to fail in browser mode at all so it seems quite stable at least from my local Blue Prism environment. So, something you could always consider is setting up a Test environment where you install a newer version of Blue Prism and runs some tests there with your automations to see if you still encounter the same issues.
Third, you could always consider trying to turn off Fixed Port Mode. I seem to always visit the Community in the evening when I'm tired so I may have overlooked this being discussed already in this thread. =) If you tried Ephemeral Port Mode, you would potentially find that browser automation would fail less often if at all. However, note that Fixed Port Mode and Ephemeral Port Mode do not function the same in all scenarios, especially when it comes to development and such. There's limitations to both. Anyway, we're all here for you if you decided to try out that route and can give some suggestions.
Last, I cannot be sure of this and it might just be superstition talking, but I tend to like using only a specific browser per machine if possible. So, if you're using Chrome and Edge and Firefox or just two of them on the same machine, I'd recommend using just one of them if you can, and then if you pair that with closing Chrome the way I suggested above, I think you'll have fewer issues.
------------------------------
Dave Morris
Cano Ai
Atlanta, GA
------------------------------
I feel like we are discussing a few different issues here.
Regarding the issue of:
ISSUE :- processes built using objects that had been identified in chrome work correctly but, intermittently (after about 3-5 times through the process it just drops the objects and will no longer find the fields.
This sounds like what has been mentioned above, an issue with Blue Prism communicating with the browser extension which is done through, by default, an ephemeral port, and typically made more resilient by changing this setting in Blue Prism System Settings to be a static port. Look for something like this in the settings:
and check the box if it isn't already checked, restart the machines and see if you still encounter this issue.
This is a known issue reported in the support portal:
Somewhat related to this issue is that if you ever, on the same runtime resource and or development machine, open studio locally, studio launches its own connection to the browser. It never disposes of it, so if from there you try to run something against Chrome from the Control Room, it will typically not be able to connect to and talk to Chrome. (and or vice versa) Refer to the explanation provided by @daniel.leach on this thread: THIS THREAD which I think explains the WHY rather eloquently.
Separately, regarding using 'kill' on, well, really anything, is that many applications don't like it because it is a forced stop very similar to ending a task forcefully through the task manager in windows. Secondly, using the native Blue Prism 'Utility - Environment' kill action isn't quite reliable because if you look at the code:
This part in an of itself isn't terrible, however, saying kill and verifying said kill actually killed it are two different things, so you really want this code to additionally have a check that the kill actually killed the thing it said it was going to kill, probably a thread sleep in between each process in the loop to wait for Windows to dispose of the process as well and move on to the next one in the loop. (waiting for it to exit is a valid .NET method and has exited is a valid .NET property of the System.Diagnostics.Process class that can be used... System.Diagnostics.Process MSDN Documentation) If you were really being paranoid you'd also check has exited before calling kill because calling kill on something that is 'being' killed will throw an exception.
Next up, this same class actually has methods called close and close main window which close out of applications significantly more gracefully when they listen to this call from .NET / Windows (I can tell you Edge and Chrome at least both listen to this and exit more gracefully and with this solution programmatically)
Next up, if you look at Blue Prism's internal code again you'll notice the try catch simply catches, does nothing, and ends the code... the issue here is lets say you have 5 instances of edge running and the code encounters and issue killing instance # 2 of 5, it will just stop, won't proceed to try and kill #3, #4, and #5.
If you wanted to be REALLY thorough you'd built a code stage that had a timeout, checked for existing instances, tried to close them gracefully, gave a grace period, then forcefully killed them, then at the end of everything it would check again how many instances still exist, and if any exist keep looping for the duration of the timeout attempting to close and kill. Finally after the timeout if no instances remain, it was successful, if any do remain, you can report that out through a success flag and a message and choose whether or not to throw an exception. (keep in mind there are a few reasons something can fail to kill and these reasons are valid reasons.)
An example rough draft thrown together of what I mean would look something like this:
Now... separately from this is the fact that when you open and close Chrome or chromium based browsers, if you don't specify the profile to use it will use the default profile and keep track of the 'crash' status of the browser in the profile file (a JSON file stored in Local AppData). If you tried your best in whichever method you prefer to gracefully close but it is still launching and popping up a message from the browser, this could potentially block spying. This can be solved by editing the profile file before launching Chrome... something like this:
------------------------------
Erin Connerley
Automation Consultant
Agilify Automation
America/Indiana/Indianapolis
------------------------------
Regarding the issue of:
ISSUE :- processes built using objects that had been identified in chrome work correctly but, intermittently (after about 3-5 times through the process it just drops the objects and will no longer find the fields.
This sounds like what has been mentioned above, an issue with Blue Prism communicating with the browser extension which is done through, by default, an ephemeral port, and typically made more resilient by changing this setting in Blue Prism System Settings to be a static port. Look for something like this in the settings:
and check the box if it isn't already checked, restart the machines and see if you still encounter this issue.This is a known issue reported in the support portal:
Somewhat related to this issue is that if you ever, on the same runtime resource and or development machine, open studio locally, studio launches its own connection to the browser. It never disposes of it, so if from there you try to run something against Chrome from the Control Room, it will typically not be able to connect to and talk to Chrome. (and or vice versa) Refer to the explanation provided by @daniel.leach on this thread: THIS THREAD which I think explains the WHY rather eloquently.
Separately, regarding using 'kill' on, well, really anything, is that many applications don't like it because it is a forced stop very similar to ending a task forcefully through the task manager in windows. Secondly, using the native Blue Prism 'Utility - Environment' kill action isn't quite reliable because if you look at the code:
Try
for each p as System.Diagnostics.Process in System.Diagnostics.Process.GetProcessesByName(Process_Name)
p.kill
next
Catch ex As Exception
End TryThis part in an of itself isn't terrible, however, saying kill and verifying said kill actually killed it are two different things, so you really want this code to additionally have a check that the kill actually killed the thing it said it was going to kill, probably a thread sleep in between each process in the loop to wait for Windows to dispose of the process as well and move on to the next one in the loop. (waiting for it to exit is a valid .NET method and has exited is a valid .NET property of the System.Diagnostics.Process class that can be used... System.Diagnostics.Process MSDN Documentation) If you were really being paranoid you'd also check has exited before calling kill because calling kill on something that is 'being' killed will throw an exception.
Next up, this same class actually has methods called close and close main window which close out of applications significantly more gracefully when they listen to this call from .NET / Windows (I can tell you Edge and Chrome at least both listen to this and exit more gracefully and with this solution programmatically)
Next up, if you look at Blue Prism's internal code again you'll notice the try catch simply catches, does nothing, and ends the code... the issue here is lets say you have 5 instances of edge running and the code encounters and issue killing instance # 2 of 5, it will just stop, won't proceed to try and kill #3, #4, and #5.
If you wanted to be REALLY thorough you'd built a code stage that had a timeout, checked for existing instances, tried to close them gracefully, gave a grace period, then forcefully killed them, then at the end of everything it would check again how many instances still exist, and if any exist keep looping for the duration of the timeout attempting to close and kill. Finally after the timeout if no instances remain, it was successful, if any do remain, you can report that out through a success flag and a message and choose whether or not to throw an exception. (keep in mind there are a few reasons something can fail to kill and these reasons are valid reasons.)
An example rough draft thrown together of what I mean would look something like this:
'Preset Message and Success
Message = vbNullString
Success = False
Dim TimeOutWatch As Stopwatch
TimeOutWatch = New Stopwatch
Try
'Catch Bad Input Data
If String.IsNullOrWhiteSpace(Process_Name) Then
Throw New Exception("Process Name to kill was blank.")
End If
If Time_Out = TimeSpan.Zero Then
Throw New Exception("Your entered Time Out timespan is set to 0.")
End If
'Attempt a cleaner close first.
'Only execute Close if there is something to Close
'the following line will count existing processes with Process_Name
If Process.GetProcessesByName(Process_Name).Length > 0 Then
'Start the stopwatch to count for timeout condition
TimeOutWatch.Start()
'Loop through all the processes of Process_Name
For Each p As Process In Process.GetProcessesByName(Process_Name)
'Check if kill attempt time has elapsed past the requested Time_Out
If TimeOutWatch.ElapsedMilliseconds <= CLng(Time_Out.TotalMilliseconds) Then
'Only attempt to Close the process if it is alive/running
'This if statement checks this condition
If Not p.HasExited() Then
Try
p.CloseMainWindow()
p.Close()
Catch ex As InvalidOperationException
'This means that the process has already exited
Message = (Message + vbCrLf + "The Process has already exited: " + vbCrLf + ex.Message).Trim()
Catch ex As NotSupportedException
'This means that the process is remote
Message = ((Message + vbCrLf + "Cannot Close Remote Process: " + vbCrLf + ex.Message).Trim())
Finally
'Do Nada
End Try
End If
Try
'This will wait a maximum of 5 seconds for the process to exit, the '5000' is milliseconds
p.WaitForExit(5000)
Thread.Sleep(100)
Catch exc As Exception
Finally
'clean the resources used by the process for the Garbage Collector to be able to clear it
p.Dispose()
Thread.Sleep(100)
End Try
Else
'This means the elapsed time during the attempt to Close the process has elapsed past the requested Time_Out
Exit For
End If
Next
End If
Thread.Sleep(1000)
'Try to catch stragglers with a little bit uglier 'kill'
'Only execute kill if there is something to kill
'the following line will count existing processes with Process_Name
If Process.GetProcessesByName(Process_Name).Length > 0 Then
'Loop through all the processes of Process_Name
For Each p As Process In Process.GetProcessesByName(Process_Name)
'Check if kill attempt time has elapsed past the requested Time_Out
If TimeOutWatch.ElapsedMilliseconds <= CLng(Time_Out.TotalMilliseconds) Then
'Only attempt to Kill the process if it is alive/running
'This if statement checks this condition
If Not p.HasExited() Then
Try
p.Kill()
Catch ex As System.ComponentModel.Win32Exception
'This means that the process was terminating or can't be terminated - we'll double check later
Message = (Message + vbCrLf + "The process was terminating or cannot be terminated: " + vbCrLf + ex.Message).Trim()
Catch ex As InvalidOperationException
'This means that the process has already exited
Message = (Message + vbCrLf + "The Process has already exited: " + vbCrLf + ex.Message).Trim()
Catch ex As NotSupportedException
'This means that the process is remote
Message = ((Message + vbCrLf + "Cannot Kill Remote Process: " + vbCrLf + ex.Message).Trim())
Finally
'Do Nada
End Try
End If
Try
'This will wait a maximum of 5 seconds for the process to exit, the '5000' is milliseconds
p.WaitForExit(5000)
Thread.Sleep(100)
Catch exc As Exception
Finally
'clean the resources used by the process for the Garbage Collector to be able to clear it
p.Dispose()
Thread.Sleep(100)
End Try
Else
'This means the elapsed time during the attempt to kill the process has elapsed past the requested Time_Out
Exit For
End If
Next
End If
Catch ex As Exception
Message = (Message + vbCrLf + ex.Message).Trim()
Finally
'Continue to wait for requested timeout to elapse if we haven't established success
While TimeOutWatch.ElapsedMilliseconds < CInt(Time_Out.TotalMilliseconds) And Not Success
If Process.GetProcessesByName(Process_Name).Length <= 0 Then
Success = True
End If
End While
'Final Success Check before exiting
If Not String.IsNullOrWhiteSpace(Process_Name) AndAlso Not Time_Out = TimeSpan.Zero AndAlso Process.GetProcessesByName(Process_Name).Length <= 0 Then
Success = True
Message = vbNullString
Else If Not String.IsNullOrWhiteSpace(Process_Name) AndAlso Not Time_Out = TimeSpan.Zero AndAlso Process.GetProcessesByName(Process_Name).Length > 0 Then
Success = False
Message = (Message + vbCrLf + "Remaining # of [" + Process_Name + "] to kill: [" + Process.GetProcessesByName(Process_Name).Length.ToString + "]").Trim()
End If
End TryNow... separately from this is the fact that when you open and close Chrome or chromium based browsers, if you don't specify the profile to use it will use the default profile and keep track of the 'crash' status of the browser in the profile file (a JSON file stored in Local AppData). If you tried your best in whichever method you prefer to gracefully close but it is still launching and popping up a message from the browser, this could potentially block spying. This can be solved by editing the profile file before launching Chrome... something like this:
Dim preferencesFilePath As String
preferencesFilePath = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData) + "\Microsoft\Chrome\User Data\Default\Preferences"
If System.IO.File.Exists(preferencesFilePath) Then
Dim preferencesText As String
preferencesText = System.IO.File.ReadAllText(preferencesFilePath)
preferencesText = System.Text.RegularExpressions.Regex.Replace(preferencesText,"(?<=,""exit_type"":"")(.*)(?="",)","Normal")
preferencesText = System.Text.RegularExpressions.Regex.Replace(preferencesText,"(?<=,""exited_cleanly"":)(.*)(?=,)","true")
System.IO.File.WriteAllText(preferencesFilePath,preferencesText)
End If------------------------------
Erin Connerley
Automation Consultant
Agilify Automation
America/Indiana/Indianapolis
------------------------------
