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Firebase emulators:start – getaddrinfo ENOTFOUND localhost localhost:4400

rbt profile image Richard Beattie Originally published at r-bt.com ・1 min read

For some reason today firebase start:emulators broke on me. In the morning it worked fine but when I returned after lunch I just got

An unexpected error has occurred.
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I tried restarting my laptop, rolling back firestore.rules changes and updating firebase-tools but nothing worked. The firebase-debug.log had some errors talking about not being able to find localhost

port check error: Error: getaddrinfo ENOTFOUND localhost localhost:4400
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However, googling this query returned nothing for the first 30 mins. However, googling this query returned nothing. After an hour of experimenting I found the solution. Add the following to your /etc/hosts file:

127.0.0.1 localhost
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Well that was an hour wasted. I still don't know how localhost got disassociated with 127.0.0.1.

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