IBM Bluemix中的暂存失败

Question

I had deployed domjudge in IBM Bluemix. It has been working fine until the last 3 days. Today, I tried to change database connectivity in DOMJudge-Web/domjudge-4.0.5/lib/use_db.php with clearDB. I have only changed the following lines in the previously mentioned file:

$priv = "dummy";
$host = "us-cdbr-iron-xxxx-xxx.cleardb.net";
$db   = "mydbname";
$user = "myusername";   
$pass = "mypassword";   

The same lines are added into the DOMJudge-Web/domjudge-4.0.5/lib/use_db.orig file.

After building and deploying the app, it does not run. The app error log is furnished below:

1/1/2016 6:21:30 AM OUT STG -----> Downloaded app package (26M)

1/1/2016 6:21:31 AM OUT STG -------> Buildpack version 4.1.5

1/1/2016 6:21:31 AM OUT STG Installing HTTPD

1/1/2016 6:21:31 AM ERR STG Traceback (most recent call last):

1/1/2016 6:21:31 AM ERR STG File "/var/vcap/data/dea_next/admin_buildpacks/aee11c73-6b49-4e76-8781-e4b28e25e848_6cbec4f53c789b674bc4f011895cfb0f72c4d3e0/scripts/compile.py", line 51, in

1/1/2016 6:21:31 AM ERR STG .from_build_pack('lib/additional_commands')

1/1/2016 6:21:31 AM ERR STG File "/var/vcap/data/dea_next/admin_buildpacks/aee11c73-6b49-4e76-8781-e4b28e25e848_6cbec4f53c789b674bc4f011895cfb0f72c4d3e0/lib/build_pack_utils/builder.py", line 189, in extensions

1/1/2016 6:21:31 AM ERR STG process_extension(path, ctx, 'compile', process, args=[self])

1/1/2016 6:21:31 AM ERR STG File "/var/vcap/data/dea_next/admin_buildpacks/aee11c73-6b49-4e76-8781-e4b28e25e848_6cbec4f53c789b674bc4f011895cfb0f72c4d3e0/lib/build_pack_utils/utils.py", line 69, in process_extension

1/1/2016 6:21:31 AM ERR STG success(getattr(extn, to_call)(*args))

1/1/2016 6:21:31 AM ERR STG File "/var/vcap/data/dea_next/admin_buildpacks/aee11c73-6b49-4e76-8781-e4b28e25e848_6cbec4f53c789b674bc4f011895cfb0f72c4d3e0/lib/httpd/extension.py", line 43, in compile

1/1/2016 6:21:31 AM ERR STG .package('HTTPD')

1/1/2016 6:21:31 AM ERR STG File "/var/vcap/data/dea_next/admin_buildpacks/aee11c73-6b49-4e76-8781-e4b28e25e848_6cbec4f53c789b674bc4f011895cfb0f72c4d3e0/lib/build_pack_utils/builder.py", line 165, in package

1/1/2016 6:21:31 AM ERR STG self._installer.install_binary(key)

1/1/2016 6:21:31 AM ERR STG File "/var/vcap/data/dea_next/admin_buildpacks/aee11c73-6b49-4e76-8781-e4b28e25e848_6cbec4f53c789b674bc4f011895cfb0f72c4d3e0/lib/build_pack_utils/cloudfoundry.py", line 206, in install_binary

1/1/2016 6:21:31 AM ERR STG strip=strip)

1/1/2016 6:21:31 AM ERR STG File "/var/vcap/data/dea_next/admin_buildpacks/aee11c73-6b49-4e76-8781-e4b28e25e848_6cbec4f53c789b674bc4f011895cfb0f72c4d3e0/lib/build_pack_utils/cloudfoundry.py", line 176, in _install_binary_from_manifest

1/1/2016 6:21:31 AM ERR STG self._dwn.download(url, self._ctx['TMPDIR'])

1/1/2016 6:21:31 AM ERR STG File "/var/vcap/data/dea_next/admin_buildpacks/aee11c73-6b49-4e76-8781-e4b28e25e848_6cbec4f53c789b674bc4f011895cfb0f72c4d3e0/lib/build_pack_utils/downloads.py", line 50, in download

1/1/2016 6:21:31 AM ERR STG raise RuntimeError("Could not download dependency: %s" % url)

1/1/2016 6:21:31 AM ERR STG RuntimeError: Could not download dependency: /httpd/2.4.12/httpd-2.4.12.tar.gz

1/1/2016 6:21:31 AM OUT STG Staging failed: Buildpack compilation step failed

1/1/2016 6:21:31 AM ERR API encountered error: App staging failed in the buildpack compile phase

I cannot identify the problem. Please help me.