"ERROR: transport error 202: connect failed: Operation timed out"

This is a problem that can be encountered on NetBeans platform when trying to debug a project.

In another post someone said

...
deps-jar:

compile:

Shared archive: sharing disabled for server vm

ERROR: transport error 202: gethostbyname: unknown host ["transport.c",L41]

FATAL ERROR in native method: JDWP No transports initialized, jvmtiError=JVMTI_ERROR_INTERNAL(113)

ERROR: JDWP Transport dt_socket failed to initialize, TRANSPORT_INIT(510) ["debugInit.c",L500]

JDWP exit error JVMTI_ERROR_INTERNAL(113): No transports initialized

JDWP exit error JVMTI_ERROR_INTERNAL(113): No transports initializedJava Result: 134

debug:

BUILD SUCCESSFUL (total time: 6 seconds)

This worked for me on OS X:

# sudo su -
# echo 127.0.0.1 `/bin/hostname` >> /etc/hosts

Of course, there are many other commands that can be used to achieve the same thing.

After this, the debugger connected right away, instead of a lengthy timeout and then failure.

The problem occurred in my case because a VPN connection (Cisco AnyConnect) change my hostname / dns servers.