dat should fail gracefully if another dat is already open on that dir

[karissa]

1. Run a dat in one directory (dat path/to/files)
2. Open a new terminal
3. Run a dat on that same directory (dat path/to/files)

It tries to open the db but its already open. It should probably fail gracefully (give a nice message) or use level-party to just open it anyway even though there's another one up already

events.js:160
      throw er; // Unhandled 'error' event
      ^
OpenError: IO error: lock tweet-data/.dat/LOCK: Resource temporarily unavailable
    at /Users/karissa/node_modules/dat/node_modules/levelup/lib/levelup.js:119:34
    at /Users/karissa/node_modules/dat/node_modules/leveldown/node_modules/abstract-leveldown/abstract-leveldown.js:39:16

[mafintosh]

It cannot use level-party. Single master is required.
On Sat, 29 Oct 2016 at 00.46, Karissa McKelvey notifications@github.com
wrote:

1. Run a dat in one directory (dat path/to/files)
2. Open a new terminal
3. Run a dat on that same directory (dat path/to/files)

It tries to open the db but its already open. It should probably fail
gracefully (give a nice message) or use level-party to just open it anyway
even though there's another one up already

events.js:160
throw er; // Unhandled 'error' event
^
OpenError: IO error: lock tweet-data/.dat/LOCK: Resource temporarily unavailable
at /Users/karissa/node_modules/dat/node_modules/levelup/lib/levelup.js:119:34
at /Users/karissa/node_modules/dat/node_modules/leveldown/node_modules/abstract-leveldown/abstract-leveldown.js:39:16

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[mafintosh]

It cannot use level-party. Single master is required.
On Sat, 29 Oct 2016 at 00.46, Karissa McKelvey notifications@github.com
wrote:

1. Run a dat in one directory (dat path/to/files)
2. Open a new terminal
3. Run a dat on that same directory (dat path/to/files)

It tries to open the db but its already open. It should probably fail
gracefully (give a nice message) or use level-party to just open it anyway
even though there's another one up already

events.js:160
throw er; // Unhandled 'error' event
^
OpenError: IO error: lock tweet-data/.dat/LOCK: Resource temporarily unavailable
at /Users/karissa/node_modules/dat/node_modules/levelup/lib/levelup.js:119:34
at /Users/karissa/node_modules/dat/node_modules/leveldown/node_modules/abstract-leveldown/abstract-leveldown.js:39:16

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[karissa]

cool lets try to fail gracefully

[karissa]

cool lets try to fail gracefully

[mafintosh]

👍 this is a easy as listening for an error on the leveldb and printing an error message. pr welcome \o/

[mafintosh]

👍 this is a easy as listening for an error on the leveldb and printing an error message. pr welcome \o/

[juliangruber]

Part 1 of the fix is here: datproject/dat-node#28

[juliangruber]

Part 1 of the fix is here: datproject/dat-node#28