René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Get to the bottom of intermittent failures on Travis","articleBody":"At this stage these are mainly my own notes on errors we have been seeing on Travis to see if I can find a pattern that can give a clue what the issue is:\n\nFrom #6585  python2.7\n\n```\n======================================================================\nFAIL: matplotlib.tests.test_backend_pdf.test_hatching_legend.test\n----------------------------------------------------------------------\nTraceback (most recent call last):\n  File \"/home/travis/build/matplotlib/matplotlib/venv/lib/python2.7/site-packages/nose/case.py\", line 197, in runTest\n    self.test(*self.arg)\n  File \"/home/travis/build/matplotlib/matplotlib/venv/lib/python2.7/site-packages/matplotlib-2.0.0b1+40.g2855857-py2.7-linux-x86_64.egg/matplotlib/testing/decorators.py\", line 55, in failer\n    result = f(*args, **kwargs)\n  File \"/home/travis/build/matplotlib/matplotlib/venv/lib/python2.7/site-packages/matplotlib-2.0.0b1+40.g2855857-py2.7-linux-x86_64.egg/matplotlib/testing/decorators.py\", line 251, in do_test\n    self._tol, in_decorator=True)\n  File \"/home/travis/build/matplotlib/matplotlib/venv/lib/python2.7/site-packages/matplotlib-2.0.0b1+40.g2855857-py2.7-linux-x86_64.egg/matplotlib/testing/compare.py\", line 337, in compare_images\n    rms = calculate_rms(expectedImage, actualImage)\n  File \"/home/travis/build/matplotlib/matplotlib/venv/lib/python2.7/site-packages/matplotlib-2.0.0b1+40.g2855857-py2.7-linux-x86_64.egg/matplotlib/testing/compare.py\", line 248, in calculate_rms\n    \"actual size {1}\".format(expectedImage.shape, actualImage.shape))\nImageComparisonFailure: image sizes do not match expected size: (144, 72, 3) actual size (346, 461, 3)\n======================================================================\nFAIL: matplotlib.tests.test_mathtext.test_mathfont_dejavuserif_12.test\n----------------------------------------------------------------------\nTraceback (most recent call last):\n  File \"/home/travis/build/matplotlib/matplotlib/venv/lib/python2.7/site-packages/nose/case.py\", line 197, in runTest\n    self.test(*self.arg)\n  File \"/home/travis/build/matplotlib/matplotlib/venv/lib/python2.7/site-packages/matplotlib-2.0.0b1+40.g2855857-py2.7-linux-x86_64.egg/matplotlib/testing/decorators.py\", line 55, in failer\n    result = f(*args, **kwargs)\n  File \"/home/travis/build/matplotlib/matplotlib/venv/lib/python2.7/site-packages/matplotlib-2.0.0b1+40.g2855857-py2.7-linux-x86_64.egg/matplotlib/testing/decorators.py\", line 261, in do_test\n    '(RMS %(rms).3f)'%err)\nImageComparisonFailure: images not close: /home/travis/build/matplotlib/matplotlib/result_images/test_mathtext/mathfont_dejavuserif_12.png vs. /home/travis/build/matplotlib/matplotlib/result_images/test_mathtext/mathfont_dejavuserif_12-expected.png (RMS 48.746)\n----------------------------------------------------------------------\n```\n","author":{"url":"https://github.com/jenshnielsen","@type":"Person","name":"jenshnielsen"},"datePublished":"2016-06-15T08:15:05.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":24},"url":"https://github.com/6586/matplotlib/issues/6586"}