eclipse下debug不了java

错误信息是：
　　ATAL ERROR in native method: JDWP No transports initialized, jvmtiError=JVMTI_ERROR_INTERNAL(113)
　　ERROR: transport error 202: gethostbyname: unknown host ["transport.c",L41]
　　ERROR: JDWP Transport dt_socket failed to initialize, TRANSPORT_INIT(510) ["debugInit.c",L500]
　　JDWP exit error JVMTI_ERROR_INTERNAL(113): No transports initialized
解决办法：
　　在/etc/hosts文件中把因各种原因而注释或删除的下文加上即可
　　

127.0.0.1 localhost.localdomain localhost