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pulseaudio [alsa-sink-VT1708S Analog] alsa-sink.c: Error opening PCM device front:0: 부적절한 인수

2016-12-20 KENNETH 0

OS : CentOS7 증상 : 리눅스 데스크탑에서 갑자기 유투브 재생이 안됨.. 탐색바를 확인하니 영상의 정지화면은 한컷씩 나오는 상태   관련 로그 log file : /var/log/message Dec 20 13:43:56 office pulseaudio[1881]: [alsa-sink-VT1708S Analog] alsa-sink.c: Error opening PCM device front:0: 부적절한 인수 Dec 20 13:43:56 office pulseaudio[1881]: [alsa-sink-VT1708S Analog] alsa-sink.c: Error opening PCM device front:0: 부적절한 인수 Dec 20 13:44:24 office pulseaudio[1881]: [alsa-sink-VT1708S Analog] alsa-sink.c: Error opening PCM device front:0: 부적절한 인수 Dec 20 13:44:24 office pulseaudio[1881]: [alsa-sink-VT1708S Analog] alsa-sink.c: Error opening PCM device front:0: 부적절한 인수 Dec 20 13:44:42 office pulseaudio[1881]: [alsa-sink-VT1708S Analog] alsa-sink.c: Error opening PCM device front:0: 부적절한 인수   pulseaudio 재시작 해줌… 원래 구동상태 ps -ef|grep pulseaudio choilha 1881 1 0 12월01 ? 00:59:26 /usr/bin/pulseaudio –start –log-target=syslog   죽이고 재시작 13:48:40 $ /usr/bin/pulseaudio –kill 13:49:14 $ /usr/bin/pulseaudio –start –log-target=syslog   이후 로그 정상, 영상 재생 정상…

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mysql server system variables log_warnings to log_error_verbosity

2016-10-04 KENNETH 0

url : http://dev.mysql.com/doc/refman/5.7/en/server-system-variables.html   under 5.7.2 : log_warnings over 5.7.2 : log_error_verbosity   log_warnings Deprecated 5.7.2 Command-Line Format –log-warnings[=#] System Variable Name log_warnings Variable Scope Global Dynamic Variable Yes Permitted Values (32-bit platforms, <= 5.7.1) Type integer Default 1 Min Value 0 Max Value 4294967295 Permitted Values (32-bit platforms, >= 5.7.2) Type integer Default 2 Min Value 0 Max Value 4294967295 Permitted Values (64-bit platforms, <= 5.7.1) Type integer Default 1 Min Value 0 Max Value 18446744073709551615 Permitted Values (64-bit platforms, >= 5.7.2) Type integer Default 2 Min Value 0 Max Value 18446744073709551615 Whether to produce additional warning messages to the error log. This variable is enabled by default (the default is 1 before MySQL 5.7.2, 2 as of 5.7.2). To disable it, set it to 0. The server logs messages about statements that are unsafe for statement-based logging if the [ more… ]

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Apache Benchmark apr_socket_recv error when performing a load test

2016-05-23 KENNETH 0

origin : http://blog.scene.ro/posts/apache-benchmark-apr_socket_recv/ Problem Apache Benchmark breaks with apr_socket_recv: Connection reset by peer (104) when performing a load test. This is even more annoying since we do not get results for the requests performed before this one. Context linux host, Ubuntu 14.04, 3.11.0-17-generic kernel performing a load test against a jekyll serve ran on localhost using ab v2.3 for the load test both jekyll and ab are being ran on the same machine Sample Output benny@alpha:~$ ab -c 50 -n 1000 http://localhost:8080/ This is ApacheBench, Version 2.3 <$Revision: 1528965 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking localhost (be patient) Completed 100 requests Completed 200 requests Completed 300 requests Completed 400 requests Completed 500 requests Completed 600 requests Completed 700 requests Completed 800 requests Completed 900 requests apr_socket_recv: Connection reset by peer [ more… ]

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jetpack 4.0 fatal error

2016-04-21 KENNETH 0

20160421 jetpack 4.0 이 릴리즈 되었습니다. 허나 업데이트 하고 나면 사이트에 문제가 발생하고 있습니다. 에러 메세지는 Fatal error: Cannot find a library with slug class.media-summary. in /WEB_PATH/wp-content/plugins/jetpack/require-lib.php on line 35 이며.. 기존 버전에는 존재하던 plugins/jetpack/class.media-summary.php 파일이 누락되 었기 때문인것 같습니다.   해당 플러그인을 삭제 처리하거나 이전 버전을 사용해야합니다.

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mysql-5.7 Client Error Codes and Messages

2016-04-05 KENNETH 0

Client Error Codes and Messages Client error information comes from the following source files: The Error values and the symbols in parentheses correspond to definitions in the include/errmsg.h MySQL source file. The Message values correspond to the error messages that are listed in the libmysql/errmsg.c file. %d and %s represent numbers and strings, respectively, that are substituted into the messages when they are displayed. Because updates are frequent, it is possible that those files will contain additional error information not listed here. Error: 2000 (CR_UNKNOWN_ERROR) Message: Unknown MySQL error Error: 2001 (CR_SOCKET_CREATE_ERROR) Message: Can’t create UNIX socket (%d) Error: 2002 (CR_CONNECTION_ERROR) Message: Can’t connect to local MySQL server through socket ’%s’ (%d) Error: 2003 (CR_CONN_HOST_ERROR) Message: Can’t connect to MySQL server on ’%s’ (%d) Error: 2004 (CR_IPSOCK_ERROR) Message: Can’t create TCP/IP socket (%d) Error: 2005 (CR_UNKNOWN_HOST) Message: Unknown MySQL server [ more… ]