[ruby_lib] source - throwing parse exception

[Satyajit Malugu]

Though I am still able to interact with page elements I am getting this error

source

get /source

JSON::ParserError: A JSON text must at least contain two octets!

from /Users/malugus/.rbenv/versions/1.9.3-p125/lib/ruby/gems/1.9.1/gems/json-1.8.0/lib/json/common.rb:155:in `initialize'

on any page. 

[bootstrap online]

Are you using Selendroid?

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[Satyajit Malugu]

no this is android

[bootstrap online]

It works for me. If you check the Appium server logs, is it sending an
empty response? Usually that error means there's no JSON to parse.

[Satyajit Malugu]

Turns out I was using a API 16 level device when this happened. But currently I am also getting this on 4.3, which I suppose is API level 18. This is a tablet nexus 7 though.

Any thoughts?

[bootstrap online]

Does uiautomatorviewer work? I'm testing against API 18 and the source
command doesn't error.

[Satyajit Malugu]

Well UIautomatorviewer didn't work for this tablet (nexus 7) but I haven't tried the same for nexus 4

Nexus 4 which is 4.3 level 18 is working alright for me. 

[bootstrap online]

I'll need the appium server logs to debug further.

[Satyajit Malugu]

This is what i see, now that you ask for it bolded seems like a problem.

debug: Appium request initiated at /wd/hub/session/c67e60e3-b158-48d6-80fe-f07416ca942d/source
info: Pushing command to appium work queue: ["dumpWindowHierarchy"]
info: [ADB] Sending command to android: {"cmd":"action","action":"dumpWindowHierarchy","params":{}}
info: [ANDROID] [info] Got data from client: {"cmd":"action","action":"dumpWindowHierarchy","params":{}}
info: [ANDROID] [info] Got command of type ACTION
info: [ANDROID] [debug] Got command action: dumpWindowHierarchy
info: [ANDROID] [info] Returning result: {"value":true,"status":0}
info: [ADB] Received command result from bootstrap
debug: transferPageSource command: "/usr/local/opt/android-sdk/platform-tools/adb" -s 0498d9c9 pull /data/local/tmp/dump.xml "/var/folders/_c/g17xmxgj48x28v_vsrsg0v7x9jw4zp/T/11394-31291-1sqkhlt.xml"
warn: remote object '/data/local/tmp/dump.xml' does not exist
info: Responding to client with success: {"status":0,"value":"","sessionId":"c67e60e3-b158-48d6-80fe-f07416ca942d"}
GET /wd/hub/session/c67e60e3-b158-48d6-80fe-f07416ca942d/source 200 83ms - 87

[bootstrap online]

The xml is not being created so this problem doesn't have anything to
do with the ruby code. You're sure that uiautomatorviewer works? If
the xml fails to dump then I would expect it to fail also.

The code that creates dump.xml is one line:
https://github.com/appium/appium/blob/master/android/bootstrap/src/io/appium/android/bootstrap/handler/DumpWindowHierarchy.java#L28

[bootstrap online]

https://github.com/appium/appium/issues/1269