unit-0 | Unit 0 lessons and materials | Build Tool library

npm can't download a prebuilt binary and thus falls back to building it with node-gyp. This is where the build fails.

Note the line in your log where it says: gyp ERR! stack Error: not found: make

It seems as if you don't have make installed. Since you're on Debian, you should be able to install make by running: sudo apt-get install build-essential.

This question has already been extensively discussed in the following question: npm failed to install time with make not found error

Make sure to take a close look at error messages :)

5gb heaps (-Xmx5120M) are lower than the minimum recommended heap size of 8gb. While you can probably tune it to make it work the database is not designed with its defaults to run in that limited of a heap. Probably the fastest and most likely way to help is to set concurrent_reads and concurrent_writes to 8 or 4. Then concurrent_compactors and concurrent_validations (if more recent version) to 1.

If you set the -XX:+HeapDumpOnOutOfMemoryError and -XX:HeapDumpPath=/somewhere/writable then on the OOM it will dump the heap and you can open it up and see what is cause. If you get it you can post heap histogram (using jmap on the dump) and people may be able to give more direction - but it may require actually poking around with a tool like yourkit or MAT to know exact cause.

If thats a deadend you can use async profiler

The error message means just what it says: you have changed the size of a dictionary while iterating over it.

That happens in this line:

I haven't run your code, but it looks like you're hardcoding too much in your subquery.