rails-segmentation-fault-using-mongoid

tail -f log/puma.stderr.log
していたらpumaのlogで下記落ちていた.


(解決策)
It seems like a bug in MRI 2.4. Follow these threads here and here
Thanks! Updating to 2.4.1 solved the problem in my case. – dusan Nov 16 '17 at 13:59

https://stackoverflow.com/questions/46120738/rails-segmentation-fault-using-mongoid
https://jira.mongodb.org/browse/RUBY-1202
https://jira.mongodb.org/browse/RUBY-1231
https://jira.mongodb.org/browse/RUBY-1194


=== puma startup: 2018-10-09 12:30:30 +0900 ===
/home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/2.4.0/forwardable.rb:228: [BUG] Segmentation fault at 0x00000000000038
ruby 2.4.0p0 (2016-12-24 revision 57164) [x86_64-linux]

    • Control frame information -----------------------------------------------

c:0091 p:0045 s:0621 e:000618 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/2.4.0/forwardable.rb:228
c:0090 p:0038 s:0612 E:000b48 BLOCK /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/mongo-2.4.3/lib/mongo/server/connection.rb:209 [FINISH]
c:0089 p:---- s:0607 e:000606 CFUNC :each
c:0088 p:0029 s:0603 E:000b18 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/mongo-2.4.3/lib/mongo/server/connection.rb:206
c:0087 p:0010 s:0596 E:000bf8 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/mongo-2.4.3/lib/mongo/server/connection.rb:176
c:0086 p:0010 s:0591 E:000ca8 BLOCK /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/mongo-2.4.3/lib/mongo/server/connection.rb:108
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c:0079 p:0028 s:0546 E:001268 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/mongo-2.4.3/lib/mongo/collection/view/iterable.rb:81
c:0078 p:0027 s:0541 E:001380 BLOCK /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/mongo-2.4.3/lib/mongo/collection/view/iterable.rb:41
c:0077 p:0023 s:0536 E:001430 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/mongo-2.4.3/lib/mongo/retryable.rb:43
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c:0075 p:0033 s:0526 E:001520 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/mongoid-6.2.1/lib/mongoid/query_cache.rb:222
c:0074 p:0020 s:0520 E:0012d8 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/mongoid-6.2.1/lib/mongoid/contextual/mongo.rb:132
c:0073 p:0022 s:0515 E:001620 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/mongoid-6.2.1/lib/mongoid/contextual.rb:20 [FINISH]
c:0072 p:---- s:0507 E:002320 CFUNC :group_by
c:0071 p:0027 s:0503 E:0022c0 METHOD /home/ubuntu/orquest-server/app/models/comment.rb:21
c:0070 p:0028 s:0495 E:0016d8 METHOD /home/ubuntu/orquest-server/app/controllers/theaters_controller.rb:225
c:0069 p:0014 s:0490 E:001750 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/actionpack-5.1.4/lib/action_controller/metal/basic_implicit_render.
c:0068 p:0014 s:0484 E:000d80 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/actionpack-5.1.4/lib/abstract_controller/base.rb:186
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c:0064 p:0011 s:0460 E:000708 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/actionpack-5.1.4/lib/abstract_controller/callbacks.rb:19
c:0063 p:0012 s:0455 E:000f60 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/actionpack-5.1.4/lib/action_controller/metal/rescue.rb:20
c:0062 p:0014 s:0449 E:001020 BLOCK /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/actionpack-5.1.4/lib/action_controller/metal/instrumentation.rb:32
c:0061 p:0014 s:0444 E:001100 BLOCK /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/activesupport-5.1.4/lib/active_support/notifications.rb:166
c:0060 p:0028 s:0441 E:0011c0 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/activesupport-5.1.4/lib/active_support/notifications/instrumenter.r
c:0059 p:0033 s:0433 E:0010d0 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/activesupport-5.1.4/lib/active_support/notifications.rb:166
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c:0057 p:0154 s:0421 E:0012d0 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/actionpack-5.1.4/lib/action_controller/metal/params_wrapper.rb:252
c:0056 p:0075 s:0413 E:001358 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/actionpack-5.1.4/lib/abstract_controller/base.rb:124
c:0055 p:0065 s:0406 E:0013d0 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/actionview-5.1.4/lib/action_view/rendering.rb:30
c:0054 p:0028 s:0400 E:001458 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/actionpack-5.1.4/lib/action_controller/metal.rb:189
c:0053 p:0050 s:0393 E:0014d8 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/actionpack-5.1.4/lib/action_controller/metal.rb:253
c:0052 p:0015 s:0386 E:001560 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/actionpack-5.1.4/lib/action_dispatch/routing/route_set.rb:49
c:0051 p:0051 s:0378 E:0015f0 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/actionpack-5.1.4/lib/action_dispatch/routing/route_set.rb:31
c:0050 p:0155 s:0370 E:0016d8 BLOCK /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/actionpack-5.1.4/lib/action_dispatch/journey/router.rb:50 [FINISH]
c:0049 p:---- s:0358 e:000357 CFUNC :each
c:0048 p:0014 s:0354 E:001668 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/actionpack-5.1.4/lib/action_dispatch/journey/router.rb:33
c:0047 p:0049 s:0349 E:001790 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/actionpack-5.1.4/lib/action_dispatch/routing/route_set.rb:834
c:0046 p:0208 s:0343 E:001810 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/omniauth-1.8.1/lib/omniauth/strategy.rb:190
c:0045 p:0013 s:0337 E:001888 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/omniauth-1.8.1/lib/omniauth/strategy.rb:168
c:0044 p:0013 s:0332 E:0018f8 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/omniauth-1.8.1/lib/omniauth/builder.rb:63
c:0043 p:0012 s:0327 E:0019a0 BLOCK /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/warden-1.2.7/lib/warden/manager.rb:36 [FINISH]
c:0042 p:---- s:0324 e:000323 CFUNC :catch
c:0041 p:0073 s:0319 E:001970 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/warden-1.2.7/lib/warden/manager.rb:35
c:0040 p:0012 s:0313 E:000328 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/rack-2.0.3/lib/rack/etag.rb:25
c:0039 p:0058 s:0302 E:0003b8 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/rack-2.0.3/lib/rack/conditional_get.rb:25
c:0038 p:0012 s:0293 E:000440 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/rack-2.0.3/lib/rack/head.rb:12
c:0037 p:0037 s:0285 E:0004b8 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/jpmobile-5.1.0/lib/jpmobile/rack/mobile_carrier.rb:11
c:0036 p:0038 s:0280 E:000558 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/rack-2.0.3/lib/rack/session/abstract/id.rb:232
c:0035 p:0010 s:0269 E:0005c8 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/rack-2.0.3/lib/rack/session/abstract/id.rb:226
c:0034 p:0030 s:0264 E:000660 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/actionpack-5.1.4/lib/action_dispatch/middleware/cookies.rb:613
c:0033 p:0014 s:0254 E:000710 BLOCK /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/actionpack-5.1.4/lib/action_dispatch/middleware/callbacks.rb:26
c:0032 p:0037 s:0251 E:0007d8 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/activesupport-5.1.4/lib/active_support/callbacks.rb:97
c:0031 p:0016 s:0242 E:0006e8 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/actionpack-5.1.4/lib/action_dispatch/middleware/callbacks.rb:24
c:0030 p:0024 s:0235 E:0008b0 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/actionpack-5.1.4/lib/action_dispatch/middleware/executor.rb:12
c:0029 p:0030 s:0227 E:000958 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/actionpack-5.1.4/lib/action_dispatch/middleware/debug_exceptions.rb
c:0028 p:0012 s:0216 E:0009d0 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/web-console-3.5.1/lib/web_console/middleware.rb:135
c:0027 p:0027 s:0210 E:000ac0 BLOCK /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/web-console-3.5.1/lib/web_console/middleware.rb:20 [FINISH]
c:0026 p:---- s:0199 e:000198 CFUNC :catch
c:0025 p:0011 s:0194 E:000a58 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/web-console-3.5.1/lib/web_console/middleware.rb:18
c:0024 p:0030 s:0187 E:000b88 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/actionpack-5.1.4/lib/action_dispatch/middleware/show_exceptions.rb:
c:0023 p:0051 s:0180 E:0007e0 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/railties-5.1.4/lib/rails/rack/logger.rb:36
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c:0015 p:0025 s:0138 E:001ae8 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/request_store-1.4.0/lib/request_store/middleware.rb:19
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c:0013 p:0105 s:0125 E:001be0 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/rack-2.0.3/lib/rack/method_override.rb:22
c:0012 p:0026 s:0119 E:001c80 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/rack-2.0.3/lib/rack/runtime.rb:22
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c:0010 p:0024 s:0102 E:001d90 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/actionpack-5.1.4/lib/action_dispatch/middleware/executor.rb:12
c:0009 p:0103 s:0094 E:001e20 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/actionpack-5.1.4/lib/action_dispatch/middleware/static.rb:125
c:0008 p:0012 s:0086 E:001ed0 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/rack-2.0.3/lib/rack/sendfile.rb:111
c:0007 p:0026 s:0074 E:001f50 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/railties-5.1.4/lib/rails/engine.rb:522
c:0006 p:0032 s:0068 E:000f68 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/puma-3.10.0/lib/puma/configuration.rb:225
c:0005 p:0275 s:0063 E:0020a8 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/puma-3.10.0/lib/puma/server.rb:605
c:0004 p:0040 s:0038 E:002150 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/puma-3.10.0/lib/puma/server.rb:437
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c:0002 p:0160 s:0016 E:001f10 BLOCK /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/puma-3.10.0/lib/puma/thread_pool.rb:120 [FINISH]
c:0001 p:---- s:0003 e:000002 (none) [FINISH]

    • Ruby level backtrace information ----------------------------------------

/home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/puma-3.10.0/lib/puma/thread_pool.rb:120:in `block in spawn_thread'

Could not find a JavaScript runtime.

ubuntuにrailsをインストールして、

$ bundle exec rails serverした時に

/home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/bundler-1.15.4/lib/bundler/runtime.rb:85:in `rescue in block (2 levels) in require': There was an error while trying to load the gem 'uglifier'. (Bundler::GemRequireError)
Gem Load Error is: Could not find a JavaScript runtime. See https://github.com/rails/execjs for a list of available runtimes.
Backtrace for gem load error is:

というエラー

やったこと

$ sudo apt-get install nodejs

Gemfilesに追加

gem 'libv8'
gem 'execjs'
gem 'therubyracer', :platforms => :ruby
$bundle install

次に

/home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/natto-1.1.1/lib/natto/binding.rb:58:in `rescue in find_library': Please set MECAB_PATH to the full path to libmecab.so (LoadError)

のエラー

$ sudo apt-get install -y mecab mecab-ipadic-utf8 libmecab-dev

で解消した。

mac + railsのとき起きるnokogiriのエラー

memo

[400] {"error":{"root_cause":[{"type":"parsing_exception","reason":"Unknown key for a START_OBJECT in [filter].","line":1,"col":142}],"type":"parsing_exception","reason":"Unknown key for a START_OBJECT in [filter].","line":1,"col":142},"status":400}


$xcode-select --install

Nokogiri 1.6.8 Install Fails on Mac OS X with xz installed from Homebrew
https://github.com/sparklemotion/nokogiri/issues/1483
Nokogiri 1.6.8 Install Fails on Mac OS X with xz installed from Homebrew · Issue #1483 · sparklemotion/nokogiri · GitHub
nokogiri - Nokogiri (鋸) is a Rubygem providing HTML, XML, SAX, and Reader parsers with XPath and CSS selector support.

GethをVagrantのUbuntuにインストール

(参考)
https://github.com/ethereum/go-ethereum/wiki/Installation-Instructions-for-Ubuntu
http://loumo.jp/wp/archive/20150626000042/

#vagrantのインストール

vagrant box add ubuntu14.04 https://cloud-images.ubuntu.com/vagrant/trusty/current/trusty-server-cloudimg-amd64-vagrant-disk1.box
vagrant init
vim Vagrantfile 
config.vm.box = "ubuntu14.04"
vagrant up

#ログイン
vagrant ssh 　または外部の場合 ssh 192.168.0.1 -l ubuntu

#インストール
sudo apt-get install software-properties-common

(aptパッケージを探すためのユーティリティ)

sudo apt-get install apt-file
sudo apt-file update
sudo apt-file search add-apt-repository
sudo apt-get install software-properties-common

(イーサリアム用のパッケージを入れる)

sudo add-apt-repository -y ppa:ethereum/ethereum
sudo apt-get update

(ここでようやくイーサリアムをインストールできる)

sudo apt-get install ethereum

#ポート解放する

sudo ufw status
sudo ufw allow 8575 <-Gethで使う
sudo ufw allow 80 <-browser-solidityで使う
#許可ポート以外閉じる
sudo ufw default deny

#準備

sudo apt-get install vim
mkdir data_testnet
cd data_testnet
vim genesis.json  -> 設定する
{
"nonce": "0x0000000000000042",
"mixhash": "0x0000000000000000000000000000000000000000000000000000000000000000",
"difficulty": "0x400",
"alloc": {},
"coinbase": "0x3333333333333333333333333333333333333333",
"timestamp": "0x0",
"parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
"extraData": "0x",
"gasLimit": "0x8000000",
"config": {}
}
#初期化
geth --datadir /home/ubuntu/data_testnet/ init /home/ubuntu/data_testnet/genesis.json
#ログイン
geth --networkid "10" --nodiscover --datadir "/home/ubuntu/data_testnet" console 2>> /home/ubuntu/data_testnet/geth_err.log
#ログイン2
geth --mine --minerthreads 2 --identity "sampleNode" --rpc --rpcport 8575 --rpcapi "web3,eth,net,personal" --rpccorsdomain "*" --rpcaddr "0.0.0.0" --datadir "/home/ubuntu/data_testnet" --unlock 0 --nodiscover --networkid 10 console 2>> /home/ubuntu/data_testnet/geth.log

#curlして見る。8575ポートが解放されていて、Gethが起動して入れば疎通できるはず。

curl -X POST http://192.168.0.1:8575/  --data '{"jsonrpc":"2.0","method":"web3_clientVersion","params":[],"id":1}'

#solcインストール

sudo apt-get install solc
solc --version
>Version: 0.4.14+commit.c2215d46.Linux.g++
which solc
>/usr/bin/solc

#browser-solidityを使えるようにする為にapacheを起動してコードを/var/www/html配下に設置する

sudo apt-get -y install apache2
sudo apt-get install git
sudo apt-get install unzip
sudo apachectl start

cd /var/www/html/
sudo wget https://github.com/ethereum/browser-solidity/archive/gh-pages.zip
sudo unzip gh-pages.zip

http://192.168.0.1/browser-solidity-gh-pages/

eth.accounts
personal.unlockAccount("0xd9155326452b5e90e81e1a878794b061a7c719ec", "hoge1")
personal.unlockAccount("0x5ad66cc65fa30eb8ef7b4ae4935a0dcb28bf4105", "hoge2")
eth.sendTransaction({from: "0xd9155326452b5e90e81e1a878794b061a7c719ec", to: "0x5ad66cc65fa30eb8ef7b4ae4935a0dcb28bf4105", value: web3.toWei(1, "ether")})
pragma solidity ^0.4.0;
contract sample {
    int num;
    function set_num(int n){
        num = n;
    }
    function get_num() returns(int) {
        return num;
    }
}

Python3 + MeCabで parseToNodeでエラー

yield node.surface.lower()
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xfe in position 0: invalid start byte

import MeCab
node = mecab.parseToNode(text)

を実行した時になぜか怒られる...。surfaceが読めてない？

(原因)
https://shogo82148.github.io/blog/2015/12/20/mecab-in-python3-final/

こちらの記事によると解析対象の文字列がPythonの管理下から外れGCされてしまっていて、
メモリ管理をMeCabに任せるように変更が必要とのこと。。

Python3 + MeCabで起こる。

import MeCab
mecab = MeCab.Tagger("-Ochasen")
mecab.parse('') #<---これを1行いれる
text = "犬と猫のどちらが好きですか？"
node = mecab.parseToNode(text)
while node:
    print (node.surface, node.feature)
    node = node.next

(memo)
ただし、
http://qiita.com/yukinoi/items/81a707c1317c97f5fdf9
によるとparseToNodeはだいぶ遅いとのこと。

pandas + matplotlib 

import numpy as np
import matplotlib as mpl
mpl.use('Agg')
import matplotlib.pyplot as plt
from mpl_toolkits.mplot3d import axes3d
from matplotlib import cm
from numpy.random import randn

def prot_test():
    #新規windowを描画する
    fig = plt.figure()

    #subplotを準備
    ax1 = fig.add_subplot(2,2,1)
    ax2 = fig.add_subplot(2,2,2)

    #ヒストグラムの描画する
    ax1.hist(randn(100).cumsum(), bins=20, color='k', alpha=0.3)

    #散布図の描画
    ax2.scatter(np.arange(30), np.arange(30) + 3 * randn(100).cumsum())

    plt.show()
    plt.savefig("image.png")


if __name__ == '__main__':
    prot_test()