Level doesn't properly work with Unix and msgpack loaded about leveldown HOT 8 CLOSED

you have to rebuild leveldown, e.g.

cd node_modules/level/node_modules/leveldown && npm i

or maybe npm i inside node_modules/level, or maybe also node-gyp rebuild inside the leveldown folder...:D

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As said in IRC: http://f.cl.ly/items/220V2D3F3V0W2i3r360K/Text%202013.08.22%2019%3A18%3A44.txt.

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hmm, so did @juliangruber's suggestion work?

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@dominictarr conversation is in ##leveldb atm

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Okay. Here's more to it: it only appears to happen if MSGPACK & LevelDown are alltogether included by the node app.

So, here's a list of errors we collected so far.

Sounds like information:

node: malloc.c:2451: sYSMALLOc: Assertion `(old_top == (((mbinptr) (((char *) &((av)->bins[((1) - 1) * 2])) - __builtin_offsetof (struct malloc_chunk, fd)))) && old_size == 0) || ((unsigned long) (old_size) >= (unsigned long)((((__builtin_offsetof (struct malloc_chunk, fd_nextsize))+((2 * (sizeof(size_t))) - 1)) & ~((2 * (sizeof(size_t))) - 1))) && ((old_top)->size & 0x1) && ((unsigned long)old_end & pagemask) == 0)' failed.

Generic failures: (if MSGPACK is included; doesn't fail if either LevelDown is excluded or script is run in sudo context which is schizophrene since the running user is root anyway..)

*** glibc detected *** node: free(): invalid pointer: 0x0000000002adb980 ***

System information:

Ubuntu 12 — Linux * 3.8.6-joyent-ubuntu-12-opt #1 SMP Tue Apr 9 01:13:00 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux — yields the assertion upon failure.

CentOS 6 — Linux * 2.6.32-279.1.1.el6.x86_64 #1 SMP Tue Jul 10 13:47:21 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux — only yields the generic failure information.

Might be a hint (found it through Google): http://pastebin.com/zLa3UEcM.

This is what fixed the issue for an issue in Lustre (they happened to stumble over it): http://review.whamcloud.com/#/c/4583/7/lustre/utils/lustre_rsync.c. (“One off allocation errors in lustre_rsync test program cause corruption of malloc arena and program faults.”)

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it should be mentioned that you're doing hot code swapping

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@juliangruber The hot swap is initiated manually on-demand.. that has no impact on the initialization of the app

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@KenanSulayman Is this still a problem? The please re-open if that's the case.

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