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在安装Eclipse插件时，总是出现
An error occurred while collecting items to be installed
session context was:(profile=epp.package.jee, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
Problems downloading artifact: org.eclipse.update.feature,edu.umd.cs.findbugs.plugin.eclipse,3.0.1.20150306-5afe4d1.
MD5 hash is not as expected. Expected: 700c2058d1720a42563e1541991f3b7f and found 3973f280b94a613552621cb99ad8ff0a.
session context was:(profile=epp.package.jee, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
Problems downloading artifact: org.eclipse.update.feature,edu.umd.cs.findbugs.plugin.eclipse,3.0.1.20150306-5afe4d1.
MD5 hash is not as expected. Expected: 700c2058d1720a42563e1541991f3b7f and found 3973f280b94a613552621cb99ad8ff0a.
这个错误。
原因：插件的MD5值不是官方指定的。
解决方法：在进行的安装的时候，将“Contact all update sites during install to find required software”这个勾去掉。