Re: Cannot write to handle N. OS reports: Bad file descriptor

[rocuinneagain]

Usually when you see this error it is due to one of:

1. A fault in the network infrastructure between hosts
2. One of the involved processes has died unexpectedly
3. Some code in either your process or the remote has purposefully closed the connection  (hclose)

There are handlers available in the .z namespace which are helpful to detect events on IPC handles:

• .z.pc is called after a connection has been closed
• .z.po is called after a connection has been opened

These could be implemented to track and attempt to reconnect dropped connections.

(.z.W is a useful dictionary or current open handles)

There are some examples such as dotz which is a library building on these features to trace, monitor and control execution.