An error occurred while collecting items to be installed session context was:(profile=D__Program Files_eclipse_testing-mars_eclipse, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
Unable to read repository at https://dl.bintray.com/fabioz/pydev/5.1.2/plugins/org.python.pydev.jython_5.1.2.201606231256.jar.
Connection reset
原因：插件的md5值和官方給定的不一致，說明這個插件不是官方給定的版本
解決辦法：安裝時，把“Contact all update sites during install to find required software”這個勾去掉
