npm ERR cb() never called

I have a Node.js app hosted on Heroku. Every time I do a git push heroku I get the following error:

Counting objects: 14, done.
Delta compression using up to 6 threads.
Compressing objects: 100% (12/12), done.
Writing objects: 100% (12/12), 1.20 KiB, done.
Total 12 (delta 8), reused 0 (delta 0)

-----> Node.js app detected
-----> Resolving engine versions
       Using Node.js version: 0.6.20
       Using npm version: 1.2.12
-----> Fetching Node.js binaries
-----> Vendoring node into slug
-----> Installing dependencies with npm
       npm http GET https://registry.npmjs.org/pg/0.6.15
       npm http GET https://registry.npmjs.org/socket.io
       npm http 200 https://registry.npmjs.org/pg/0.6.15
       npm http GET https://registry.npmjs.org/pg/-/pg-0.6.15.tgz
       npm http 200 https://registry.npmjs.org/socket.io
       npm http GET https://registry.npmjs.org/socket.io/-/socket.io-0.9.13.tgz
       npm http 200 https://registry.npmjs.org/pg/-/pg-0.6.15.tgz
       npm http 200 https://registry.npmjs.org/socket.io/-/socket.io-0.9.13.tgz
       npm http GET https://registry.npmjs.org/socket.io-client/0.9.11
       npm http GET https://registry.npmjs.org/policyfile/0.0.4
       npm http GET https://registry.npmjs.org/base64id/0.1.0
       npm http GET https://registry.npmjs.org/redis/0.7.3
       npm http GET https://registry.npmjs.org/generic-pool/1.0.9
       npm http 200 https://registry.npmjs.org/policyfile/0.0.4
       npm http GET https://registry.npmjs.org/policyfile/-/policyfile-0.0.4.tgz

       npm http 200 https://registry.npmjs.org/base64id/0.1.0
       npm http GET https://registry.npmjs.org/base64id/-/base64id-0.1.0.tgz
       npm http 200 https://registry.npmjs.org/generic-pool/1.0.9
       npm http GET https://registry.npmjs.org/generic-pool/-/generic-pool-1.0.9
.tgz
       npm http 200 https://registry.npmjs.org/socket.io-client/0.9.11
       npm http GET https://registry.npmjs.org/socket.io-client/-/socket.io-clie
nt-0.9.11.tgz
       npm http 200 https://registry.npmjs.org/redis/0.7.3
       npm http GET https://registry.npmjs.org/redis/-/redis-0.7.3.tgz
       npm http 200 https://registry.npmjs.org/policyfile/-/policyfile-0.0.4.tgz

       npm http 200 https://registry.npmjs.org/base64id/-/base64id-0.1.0.tgz
       npm http 200 https://registry.npmjs.org/generic-pool/-/generic-pool-1.0.9
.tgz
       npm http 200 https://registry.npmjs.org/socket.io-client/-/socket.io-clie
nt-0.9.11.tgz
       npm http 200 https://registry.npmjs.org/redis/-/redis-0.7.3.tgz

       > pg@0.6.15 install /tmp/build_36us8733h7kkr/node_modules/pg
       > node-waf configure build || (exit 0)

       Checking for program g++ or c++          : /usr/bin/g++
       Checking for program cpp                 : /usr/bin/cpp
       Checking for program ar                  : /usr/bin/ar
       Checking for program ranlib              : /usr/bin/ranlib
       Checking for g++                         : ok
       Checking for node path                   : not found
       Checking for node prefix                 : ok /tmp/node-node-nNUw
       Checking for program pg_config           : /usr/bin/pg_config
       'configure' finished successfully (0.058s)
       Waf: Entering directory `/tmp/build_36us8733h7kkr/node_modules/pg/build'
       [1/2] cxx: src/binding.cc -> build/Release/src/binding_1.o
       [2/2] cxx_link: build/Release/src/binding_1.o -> build/Release/binding.no
de
       Waf: Leaving directory `/tmp/build_36us8733h7kkr/node_modules/pg/build'
       'build' finished successfully (0.492s)
       npm http GET https://registry.npmjs.org/uglify-js/1.2.5
       npm http GET https://registry.npmjs.org/ws
       npm http GET https://registry.npmjs.org/xmlhttprequest/1.4.2
       npm http GET https://registry.npmjs.org/active-x-obfuscator/0.0.1
       npm http 200 https://registry.npmjs.org/active-x-obfuscator/0.0.1
       npm http GET https://registry.npmjs.org/active-x-obfuscator/-/active-x-ob
fuscator-0.0.1.tgz
       npm http 200 https://registry.npmjs.org/uglify-js/1.2.5
       npm http GET https://registry.npmjs.org/uglify-js/-/uglify-js-1.2.5.tgz
       npm http 200 https://registry.npmjs.org/xmlhttprequest/1.4.2
       npm http GET https://registry.npmjs.org/xmlhttprequest/-/xmlhttprequest-1
.4.2.tgz
       npm http 200 https://registry.npmjs.org/ws
       npm http GET https://registry.npmjs.org/ws/-/ws-0.4.25.tgz
       npm http 200 https://registry.npmjs.org/active-x-obfuscator/-/active-x-ob
fuscator-0.0.1.tgz
       npm http 200 https://registry.npmjs.org/uglify-js/-/uglify-js-1.2.5.tgz
       npm http 200 https://registry.npmjs.org/xmlhttprequest/-/xmlhttprequest-1
.4.2.tgz
       npm http 200 https://registry.npmjs.org/ws/-/ws-0.4.25.tgz
       npm http GET https://registry.npmjs.org/zeparser/0.0.5
       npm http GET https://registry.npmjs.org/commander
       npm http GET https://registry.npmjs.org/tinycolor
       npm http GET https://registry.npmjs.org/options
       npm http 200 https://registry.npmjs.org/zeparser/0.0.5
       npm http GET https://registry.npmjs.org/zeparser/-/zeparser-0.0.5.tgz
       npm http 200 https://registry.npmjs.org/options
       npm http GET https://registry.npmjs.org/options/-/options-0.0.3.tgz
       npm http 200 https://registry.npmjs.org/tinycolor
       npm http GET https://registry.npmjs.org/tinycolor/-/tinycolor-0.0.1.tgz
       npm http 200 https://registry.npmjs.org/commander
       npm http GET https://registry.npmjs.org/commander/-/commander-0.6.1.tgz
       npm http 200 https://registry.npmjs.org/zeparser/-/zeparser-0.0.5.tgz
       npm http 200 https://registry.npmjs.org/options/-/options-0.0.3.tgz
       npm http 200 https://registry.npmjs.org/tinycolor/-/tinycolor-0.0.1.tgz
       npm http 200 https://registry.npmjs.org/commander/-/commander-0.6.1.tgz

       > ws@0.4.25 install /tmp/build_36us8733h7kkr/node_modules/socket.io/node_
modules/socket.io-client/node_modules/ws
       > (node-gyp rebuild 2> builderror.log) || (exit 0)

       make: Entering directory `/tmp/build_36us8733h7kkr/node_modules/socket.io
/node_modules/socket.io-client/node_modules/ws/build'
         CXX(target) Release/obj.target/bufferutil/src/bufferutil.o
         SOLINK_MODULE(target) Release/obj.target/bufferutil.node
         SOLINK_MODULE(target) Release/obj.target/bufferutil.node: Finished
         COPY Release/bufferutil.node
         CXX(target) Release/obj.target/validation/src/validation.o
         SOLINK_MODULE(target) Release/obj.target/validation.node
         SOLINK_MODULE(target) Release/obj.target/validation.node: Finished
         COPY Release/validation.node
       make: Leaving directory `/tmp/build_36us8733h7kkr/node_modules/socket.io/
node_modules/socket.io-client/node_modules/ws/build'
       npm ERR! cb() never called!
       npm ERR! not ok code undefined
       npm ERR! cb() never called!
       npm ERR! not ok code 1
 !     Failed to install --production dependencies with npm
 !     Heroku push rejected, failed to compile Node.js app

To git@heroku.com:still-chamber-1286.git
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'git@heroku.com:still-chamber-1286.git'

The error is in the last few lines: npm ERR! cb() never called! npm ERR! not ok code undefined npm ERR! cb() never called! npm ERR! not ok code 1 ! Failed to install --production dependencies with npm ! Heroku push rejected, failed to compile Node.js app

To git@heroku.com:still-chamber-1286.git
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'git@heroku.com:still-chamber-1286.git'

I have had no problems with pushing my code to Heroku before; only since Monday have I had this error.

I have seen similar posts on the web referring to slightly different errors, but haven't seen one with ! [remote rejected] master -> master (pre-receive hook declined) before.

For anyone hitting this page around Sept 29th, 2013, there's a closed bug in Node.js 0.10.19 which is causing this error.

https://github.com/isaacs/npm/issues/2907#issuecomment-15215278 https://github.com/joyent/node/issues/6263#issuecomment-25113849

If you're on Heroku you should upgrade to 0.10.20

"engines": {
    "node": "0.10.20"
}

This workaround worked for me:

$ sudo npm cache clean

My node and npm versions are:

$ node -v
v0.10.0

$ npm -v
1.2.14

npmjs.org/doc/cache.html

Do you have a specific version of "npm" specified under "engines" in your package.json? Sounds like NPM v1.2.15 resolved the issue (and Heroku has available). I was getting the same problem with "1.1.x".

I had the same problem with NPM version 1.3.11, and solved it simply by re-running the exact same command multiple times ("npm update -g" in my case). The error popped up for a different package on each subsequent run and eventually everything updated successfully.

For me at least, it seems like it was being caused by a network issue (corrupted downloads). I was also getting an error about an invalid package, which I was able to resolve by deleting all instances of "tmp.tgz".

Edit: (Probably unrelated, but in case this helps anyone: I was using Windows, and started a command prompt as an Administrator after receiving the initial error).

Picking up where mdp left, the problem is with node 0.10.19 and npm 1.3.11

I found the easiest way to manage the downgrade to keep things going smoothly to be NVM, here is a nice tutorial on how to use it. I had my server environment modified and running correctly downgrading from 0.10.19 to 0.10.18 in a matter of minutes with NVM.

brew uninstall node
cd /usr/local
git checkout f7bbdcc /usr/local/Library/Formula/node.rb
brew install node

Find other versions like so:

brew versions node

It seems like this issue is not occurring with a specific configuration or node version. We experienced it a couple of times when redeploying and suspect the npm servers to cause this issue.

Retrying a couple of times did solve the issue eventually.

I just had this exactly issue when trying to install the Sage theme for WordPress. When I ran npm install on the theme directory, it failed.

Looking in the dependencies in package.json, I could see that the engine I was running for Node was out of date. Running node -v on the command line showed that I was on v0.10.9, and the latest version of Sage requires >= 0.12.0

So here's the fix for that. These steps are from David Walsh's blog

  1. Clear your npm cache: sudo npm cache clean -f
  2. Install the latest version of the Node helper: npm install -g n
  3. Tell the helper (n) to install the latest stable version of Node: sudo n stable

You should then get a progress display, after which you will be up to date.

When I ran npm install after doing this, everything worked fine, and I was able to run gulp to build the initial dist directory.