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Troubleshooting

This document contains solutions for certain issues our users encountered in the past while using Lerna.

Bootstrap Command

Error when using yarn as an npm client

Prior to the release of Lerna v2.0.0-rc.3 users of the flag --npm-client who provided yarn as a client may have suffered from the bootstrap process not being able to run properly.

Error running command.
error Command failed with exit code 1.

If you can upgrade Lerna to said version please do so, or as an alternative solution you can add --concurrency=1.

Import Command

Buffer problems during import

When you try to import a repository which has many commits in it there is a chance that you get an error such as:

DeprecationWarning: Unhandled promise rejections are deprecated

or

Error: spawnSync /bin/sh ENOBUFS during ImportCommand.execute

Solution:

Run lerna import with the --max-buffer flag and provide a large enough number (in bytes). At the writing of this entry the underlying default is 10MB, so you should keep this in mind.