在安装pydev到50%时报错：

install software has encounted a problem
an error occurred while collecting items to be installed

错误显示：

An error occurred while collecting items to be installed
session context was:(profile=epp.package.standard, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
Unable to read repository at http://pydev.org/updates/plugins/org.python.pydev_3.9.0.201411111611.jar .
Read timed out
Unable to read repository at http://pydev.org/updates/plugins/org.python.pydev.customizations_3.9.0.201411111611.jar .
Read timed out
Unable to read repository at http://pydev.org/updates/plugins/org.python.pydev.jython_3.9.0.201411111611.jar .
Read timed out
Unable to read repository at http://pydev.org/updates/plugins/org.python.pydev.parser_3.9.0.201411111611.jar .
Read timed out
Unable to read repository at http://pydev.org/updates/plugins/org.python.pydev.refactoring_3.9.0.201411111611.jar .
Read timed out
Unable to read repository at http://pydev.org/updates/plugins/org.python.pydev.shared_core_3.9.0.201411111611.jar .
Read timed out
Unable to read repository at http://pydev.org/updates/plugins/org.python.pydev.shared_ui_3.9.0.201411111611.jar .
Read timed out

请问是不是更eclipse的版本有关啊，还是其他什么原因