crash after running for several hours

[kennedc]

I wrote a webcrawler using hound, but after running several hours i get this errror which crashes the program

** (RuntimeError) Tried to run command without establishing a connection Build info: version: '3.0.1', revision: '1969d75', time: '2016-10-18 09:48:19 -0700' System info: host: 'rootkc', ip: '127.0.1.1', os.name: 'Linux', os.arch: 'amd64', os.version: '4.4.0-66-generic', java.version: '1.8.0_121' Driver info: org.openqa.selenium.firefox.FirefoxDriver Capabilities [{rotatable=false, raisesAccessibilityExceptions=false, firefoxOptions={args=[], profile=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}, appBuildId=20160303134406, version=, platform=LINUX, proxy={}, nativeEvents=false, specificationLevel=1, acceptSslCerts=false, browserVersion=45.0, platformVersion=4.4.0-66-generic, XULappId={ec8030f7-c20a-464f-9b0e-13a3a9e97384}, browserName=Firefox, takesScreenshot=true, javascriptEnabled=false, takesElementScreenshot=true, platformName=Linux, device=desktop, cssSelectorsEnabled=true, firefox_profile=UEsDBBQAAAAIALs1dUo5CGBGcAAAA...}] Session ID: f04d305c-62c0-4eb4-81d7-d212273354c7 (hound) lib/hound/request_utils.ex:63: Hound.RequestUtils.handle_response/3 (navo) lib/token.ex:7: Token.get_url_from_browser/0 (navo) lib/token.ex:112: Token.update_url_token/5 (navo) lib/navo.ex:180: anonymous fn/3 in Navo.get_model_data/2 (elixir) lib/enum.ex:1229: Enum."-map/2-lists^map/1-0-"/2 (elixir) lib/enum.ex:1229: Enum."-map/2-lists^map/1-0-"/2 (elixir) lib/enum.ex:1229: Enum."-map/2-lists^map/1-0-"/2 (elixir) lib/enum.ex:1229: Enum."-map/2-lists^map/1-0-"/2 Any way to avoid this?