falsecz

esp-modbus TCP slave — TID scope patch (issue #161 / EPROT-55, tested against v2.1.3)

TL;DR: on esp-modbus v2.1.3 TCP slave, two concurrent TCP clients whose requests land in the same millisecond window trigger persistent latency degradation on the surviving connection — even after the "attacker" client disconnects. guaranteed_repro.py reproduces it 100 %. The v2.1.3 fixes for #161 (cc8f3f6, c83a7ea) address a related wake-race and event-loop starvation, but by their own commit messages do not cover the state leak we observe. This gist contains:

falsecz

## you need brew install parallel - paralel from moreutils doesn't work
## brew edit parallel add:
## `keg_only "My reason for making this keg-only"`

aws s3 ls "s3://sat-tiles" | awk '{print $2}'  | /usr/local/opt/parallel/bin/parallel  -j 400 "s3cmd del --recursive --force {.}"

falsecz

2015-09-14 19:41:08.161 TicTacIOiOS[1333:74661] SocketClient: Adding engine
2015-09-14 19:41:08.162 TicTacIOiOS[1333:74661] SocketEngine: Starting engine
2015-09-14 19:41:08.162 TicTacIOiOS[1333:74661] SocketEngine: Handshaking
2015-09-14 19:41:08.162 TicTacIOiOS[1333:74661] SocketEngine: Doing polling request
2015-09-14 19:41:08.286 TicTacIOiOS[1333:74661] SocketEngine: Got polling response
2015-09-14 19:41:08.288 TicTacIOiOS[1333:74661] SocketEngine: Got message: 0{"sid":"Mq4WNRJSTAcLsVvFAAAA","upgrades":["websocket"],"pingInterval":25000,"pingTimeout":60000}
2015-09-14 19:41:08.289 TicTacIOiOS[1333:74661] SocketEngine: Doing polling request
2015-09-14 19:41:08.346 TicTacIOiOS[1333:74661] SocketEngine: Got polling response
2015-09-14 19:41:08.347 TicTacIOiOS[1333:74661] SocketEngine: Doing polling request
2015-09-14 19:41:08.347 TicTacIOiOS[1333:74661] SocketEngine: Got message: 40

falsecz

pbpaste | awk '{print $1}' | awk -F. '{print $2}' | grep -v "^$" |  awk 'NR%2{printf  $0" ";next;}1' | awk '{print "merge_region \x27"$1"\x27, \x27"$2"\x27"}'

falsecz

Konec requestu
Spinkacek
Zkousim flush
Volam flush
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x8 pc=0x4ed7d]

goroutine 21 [running]:
runtime.panic(0x2573c0, 0x3e87a4)
	/usr/local/Cellar/go/1.3.3/libexec/src/pkg/runtime/panic.c:279 +0xf5

falsecz

#!/bin/bash

FIRST=0

echo "tell application \"System Events\" to keystroke \"t\" using command down" | osascript

for var in "$@"; do
	if [ "$FIRST" = 1 ]; then
		echo "tell application \"System Events\" to keystroke \"d\" using command down" | osascript
	fi

falsecz

@s3 = "s3a://XXXX:XXXX@BUCKET/"
@libjars = `ls /opt/hbase/lib/*.jar | tr "\n" ","`
@ignore = [ /zipkin\..*/i, /.*_temp/i, /.*tmp/i, /test_.*/i, /.*_test/i, /.*_old/i ]
@mappers = "6"

include Java

java_import org.apache.hadoop.hbase.HBaseConfiguration
java_import org.apache.hadoop.hbase.client.HBaseAdmin
java_import org.apache.hadoop.hbase.snapshot.ExportSnapshot

falsecz

## coffee --nodejs --expose-gc index.coffee


###
  sam autor asyncu pise ze se to ma udelat takhle

  https://github.com/caolan/async/pull/85#issuecomment-13072390
  or just use a named function for the final callback and call that instead
  of the task callback passed into the successful task function.
###

falsecz

Keybase proof

I hereby claim:

• I am falsecz on github.
• I am falsecz (https://keybase.io/falsecz) on keybase.
• I have a public key whose fingerprint is 75C5 084C F5B7 F4CA C962 026A 71B2 56BB E772 E4F8

To claim this, I am signing this object:

falsecz

{
  "name": "interlock",
  "image": "ehazlett/interlock",
  "version": "0.1",
  "author": "ehazlett",
  "description": "application router and load balancer",
  "url": "https://github.com/ehazlett/interlock",
  "config": {
    "prompt_args": [