eclipse一直连接不上市场,报错?

eclipse连接不上市场

    Cannot open Eclipse Marketplace

Cannot install remote marketplace locations: Connection failed

This is most often caused by a problem with your internet connection. Please check your internet connection and retry.
Cannot complete request to http://marketplace.eclipse.org/catalogs/api/p: Unable to read repository at http://marketplace.eclipse.org/catalogs/api/p.
Unable to read repository at http://marketplace.eclipse.org/catalogs/api/p.
Connection reset
Connection failed

This is most often caused by a problem with your internet connection. Please check your internet connection and retry.
Connection reset

我在eclipse.ini中加上了-Djava.net.preferIPv4Stack=true
在window下的preferences下的network Connections中选择了Manual,
问题还是存在,请问怎样解决?

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