i have used java on windows 7 (64bit) machines quite time , have never had problems not being able create network connection. on systems @ company i'm working need set "-djava.net.preferipv4stack=true" or seems java processes not able create single connection.
the downside if don't set "_java_options" have configure tons of services use setting. if use java outputs silly "picked up: _java_options..." stderr (wonder guy made silly decision). makes gwt compiles fail in intellij.
what know ... first time i'm having these problems , guess must somehow related setup of operating system. causing these problems (as mentioned ... have 4 other systems windows 7 , 64 bit java vms don't have these problems).
chris
ok found out reason.
this problem seemed have occured on systems containing special version of remote access software our company used. seems have inserted modified dlls windows network stack (we told in order auto-detect network connectivity). seems dll had issues, causing ipv6 traffic blocked. caused affected machines have regular bluescreens. uninstalling software got system bluescreen free , no longer need preferipv4stack setting.
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