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JavaScript heap out of memory

See original GitHub issue

btc-rpc-explorer sometimes crashes while running but not actively serving webpages with FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory

Environment:

Bitcoin Core 18.0
NodeJS 10.15.3
Code Version / Commit [e.g. ab6cde8]
2 GB RAM with 4 GB swap

Screenshots or Log Output

<--- Last few GCs --->

[7042:0x1b4ce58] 11672336 ms: Mark-sweep 698.2 (723.9) -> 698.2 (724.9) MB, 9005.3 / 0.0 ms  (average mu = 0.076, current mu = 0.001) allocation failure scavenge might not succeed


<--- JS stacktrace --->

==== JS stack trace =========================================

    0: ExitFrame [pc: 0x2576ae9c]
Security context: 0x22d12705 <JSObject>
    1: handleWriteReq(aka handleWriteReq) [0x5c58b675] [internal/stream_base_commons.js:23] [bytecode=0x5d3d9199 offset=139](this=0x2098438d <undefined>,req=0x29ce37a1 <WriteWrap map = 0x3e6301b1>,data=0x29ce3765 <Very long string[199423]>,encoding=0x22d23d99 <String[4]: utf8>)
    2: writeGeneric(aka writeGeneric) [0x5c589185] [internal/stream_base_commons.js:71] [...

FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory
Aborted

Issue Analytics

State:
Created 4 years ago
Comments:7 (7 by maintainers)

Top GitHub Comments

1reaction

janosidecommented, Jan 5, 2021

Thanks for the update. Will try to prioritize a deeper investigation.

0reactions

sangamancommented, Jan 7, 2021

Here’s another snippet from a recent crash in case it helps.

[huge json object from a getRawTransaction call]
"headers":{"content-type":"application/json","date":"Wed, 06 Jan 2021 23:29:19 GMT","content-length":"2037","connection":"
close"},"id":"38f58a3b-03d3-4e6b-9ec1-a2cf45ec20e9","statusCode":200,"type":"response","uri":"http://localhost:8332/"},"msg":"Received response for request 38f58a3b-03d3-4e6b-9ec1-a2cf45ec20e9","time":"2021-01-06T23:29:19.191Z","v":0}
  express:view lookup "index.pug" +8s
  express:view stat "/home/bitcoin/btc-rpc-explorer/views/index.pug" +0ms
  express:view render "/home/bitcoin/btc-rpc-explorer/views/index.pug" +3ms

<--- Last few GCs --->

[2249:0x3834430] 89842906 ms: Mark-sweep (reduce) 497.7 (499.3) -> 497.5 (501.1) MB, 7286.2 / 0.1 ms  (average mu = 0.147, current mu = 0.014) allocation failure scavenge might not succeed
[2249:0x3834430] 89856204 ms: Mark-sweep (reduce) 498.0 (501.1) -> 497.9 (501.3) MB, 9939.4 / 0.1 ms  (average mu = 0.212, current mu = 0.253) allocation failure scavenge might not succeed

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