IE throw null object exception when flash call javascript function

用open flash chart第一次正常载入一个图表到页面之后，当使用jQuery.fn.empty()方法移除此图表时，IE中会抛出一个错误，其他浏览器都是正常的，内容如下：

JScript - script block, line 1 character 124
'null' is null or not an object

通过IE8的debug工具可以看到出错时，javascript正在执行的代码如下：

try { document.getElementById("report-charts").SetReturnValue(__flash__toXML(ofc_resize([66,-96,66,-87])) ); } catch (e) { document.getElementById("report-charts").SetReturnValue("<undefined/>"); }

这个并不是页面中的javascript代码，应该是flash中调用外部javascript方法时，所使用的javascript代码，在IE8中断点调试，可以发现document.getElementById("report-charts")的结果为null，所以抛出了以上错误。
避过此问题的办法是在陊除已经载入的图表时，不调用jQuery.fn.empty()方法，而是直接使用jQuery.fn.html('')，将flash所在父元素的内容置空：

$('#report-charts').parent().html('');
// 如果使用$('#report-charts').parent().empty();在IE中则会报错
// ... 重新生成report-charts对象并载入新的flash图表
swfobject.embedSWF(ofc, "report-charts", "100%", "300", "9.0.0", "expressInstall.swf", {"get-data":"get_chart_0"});

sqlite3 database disk image is malformed

sqlite3 报错提示： database disk image is malformed

看提示意思是指数据库的数据文件格式发生异常，所以数据查询和写入不正常，在网上google了一些文章，找到了一个解决方法。
一般来说，sqlite3的数据文件发生这个问题，想直接修复数据是行不通了，
在进入sqlite3后的命令行中，运行以下命令：
PRAGMA integrity_check
*** in database main ***
On tree page 120611 cell 0: 3 of 4 pages missing from overflow list starting at 120617
On tree page 120616 cell 0: 3 of 4 pages missing from overflow list starting at 120621
On tree page 3309 cell 0: 3 of 4 pages missing from over

假设原数据库名: abc.db

运行命令:
$> sqlite3 abc.db

.output "data.sql"
.dump
.quit

再建个新数据库 abcd.db
$> sqlite3 abcd.db

然后

.read "data.sql"
.quit

然后修复原来的数据库名和文件权限，应该就没事了。

References: sqlite3 database disk image malformed

Open Flash Chart IO ERROR Loading test data Error #2032

在IE6中使用open flash chart2加载图表的json数据时，第一次载入数据，图表渲染正常，第二次就会报一个错误，提示数据加载错误：

Open Flash Chart
IO ERROR
Loading test data
Error #2032

而在其他的浏览器，如IE8/firefox/chrome中都是正常的，在网上搜索了一些回答，其中有人提到说这是因为浏览器的缓存造成的问题，只要在用swfobject加载open-flash-chart.swf时，在url后面加上一个动态参数，让浏览器不要使用本地缓存：

swfobject.embedSWF("open-flash-chart.swf?t=" + (new Date()).getTime(), "charts-div-id", "100%", "300", "9.0.0", "expressInstall.swf", {"get-data":"get_chart_0"});

References: Open Flash Chart IO ERROR Loading test data Error #2032

mysqlbinlog Ver 3.3和3.1版本之间的输出差异

mysqlbinlog Ver 3.3中多了一个--base64-output参数，默认值为auto:

--base64-output[=name]
Determine when the output statements should be
base64-encoded BINLOG statements: 'never' disables it and
works only for binlogs without row-based events; 'auto'
is the default and prints base64 only when necessary
(i.e., for row-based events and format description
events); 'always' prints base64 whenever possible.
'always' is for debugging only and should not be used in
a production system. The default is 'auto'.
--base64-output is a short form for
--base64-output=always.

在原来的Ver3.1版本中没有此参数，对比mysql5.0生成的日志文件的输出结果：
Ver3.1版本中使用mysqlbinlog输出结果：

shell> mysqlbinlog mysql-bin.000182|less
/*!40019 SET @@session.max_insert_delayed_threads=0*/;
/*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/;
DELIMITER /*!*/;
# at 4
#100515 1:38:58 server id 25 end_log_pos 98 Start: binlog v 4, server v 5.0.37-log created 100515 1:38:58
# at 98

Ver3.3版本中使用mysqlbinlog输出结果：

shell> mysqlbinlog --base64-output=never mysql-bin.000182|less
/*!40019 SET @@session.max_insert_delayed_threads=0*/;
/*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/;
DELIMITER /*!*/;
# at 4
#100515 1:38:58 server id 25 end_log_pos 98 Start: binlog v 4, server v 5.0.37-log created 100515 1:38:58
# at 98

shell> mysqlbinlog --base64-output=auto mysql-bin.000182|less
/*!40019 SET @@session.max_insert_delayed_threads=0*/;
/*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/;
DELIMITER /*!*/;
# at 4
#100515 1:38:58 server id 25 end_log_pos 98 Start: binlog v 4, server v 5.0.37-log created 100515 1:38:58
BINLOG '
sortSw8ZAAAAXgAAAGIAAAAAAAQANS4wLjM3LWxvZwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAEzgNAAgAEgAEBAQEEgAASwAEGg==
'/*!*/;
# at 98

从上面结果比较而言，相当于3.1版本的mysqlbinlog的base64-output参数默认为never。
在mysql 5.0中带的mysqlbinlog一般为3.1版本的，而mysql5.1版本中带的mysqlbinlog则为3.3版本，如果需要将mysql5.0生成的日志文件导入mysql5.1时，需要将mysqlbinlog的base64-output值设置为never。如果不设置此参数，导入日志时，会在

BINLOG 'sortSw8ZAAAAXgAAAGIAAAAAAAQANS4wLjM3LWxvZwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAEzgNAAgAEgAEBAQEEgAASwAEGg=='

处报SQL语法错误。

MySQL5 slave同步报错(server_errno=1236)

100519 19:35:33 [Note] Slave I/O thread: connected to master 'repl@master:3306', replication started in log 'mysql-bin.000176' at position 615525147

100519 19:35:33 [ERROR] Error reading packet from server: Could not find first log file name in binary log index file ( server_errno=1236)

从日志信息上可知，slave已经连接到master，并且准备从指定的binlog文件指定位置开始同步，但后面错误提示日志文件找不到，而master服务器上日志文件是存在的。
这种情况有二种处理方法：
一、重启主数据库(master)之后，然后slave上stop slave;start slave，再检查同步的状态。
二、不重启主服务器，则用mysqlbinlog根据start-position或者start-datetime，将日志分析出来后，将分析结果在slave上用mysql命令导入，导入完成后，再用CHANGE MASTER TO语句，从下一个日志文件MASTER_LOG_POSITION=98开始同步。

另外在使用mysqlbinlog工具进行日志导入时，需要注意以下问题，下面内容转自MySQL官方手册：
如果MySQL服务器上有多个要执行的二进制日志，安全的方法是在一个连接中处理它们。下面是一个说明什么是不安全的例子：

shell> mysqlbinlog hostname-bin.000001 | mysql # DANGER!!
shell> mysqlbinlog hostname-bin.000002 | mysql # DANGER!!

使用与服务器的不同连接来处理二进制日志时，如果第1个日志文件包含一个CREATE TEMPORARY TABLE语句，第2个日志包含一个使用该临时表的语句，则会造成问题。当第1个mysql进程结束时，服务器撤销临时表。当第2个mysql进程想使用该表时，服务器报告 “不知道该表”。

要想避免此类问题，使用一个连接来执行想要处理的所有二进制日志中的内容。下面提供了一种方法：

shell> mysqlbinlog hostname-bin.000001 hostname-bin.000002 | mysql -u root -ppassword

Reference: http://yuweijun.blogspot.com/2009/12/mysql50.html

MySQL5 Replication fails with "log event entry exceeded max_allowed_packet"

配置文件中有二个参数设置需要注意，max_allowed_packet在主从服务器上的设置最好是设置相同，并且将read_buffer_size <= max_allowed_packet。 
如果这二个配置正确，仍然报错，则需要STOP SLAVE; 并CHANGE MASTER TO，调整master_log_pos的值，这个值与服务器的日志文件要对应上。
Reference: http://bugs.mysql.com/bug.php?id=15937
http://bugs.mysql.com/bug.php?id=8215

stack level too deep in will_paginate

After update rails from 1.2.5 to 2.2.2, get below exception:
stack level too deep
../vendor/plugins/will_paginate/lib/will_paginate/finder.rb:81:in `method_missing_without_paginate'
../vendor/plugins/will_paginate/lib/will_paginate/finder.rb:82:in `method_missing'

solution, update will_paginate:
$> script/plugin install git://github.com/mislav/will_paginate.git

rails error ActionController::InvalidAuthenticityToken

升级到Rails 2.2.2后，在用户登录时抛出以上错误，因为Rails新版本对安全控制做了一些加强措施，只要在form中添加<%= token_tag %>即可，Rails会添加一个token(在action中的form_authenticity_token方法生成这个token)在form中，随表单一起提交，可以适当的防止一些web攻击。
<input name="authenticity_token" type="hidden" value="d688e6bf60f43bd171504e059de1ba03f876d129" />
具体可参考 ActionController::RequestForgeryProtection 和 config/environment.rb 中的配置说明：
# Your secret key for verifying cookie session data integrity.
# If you change this key, all old sessions will become invalid!
# Make sure the secret is at least 30 characters and all random,
# no regular words or you'll be exposed to dictionary attacks.
config.action_controller.session = {
:session_key => '_sv3_session',
:secret => 'b35a7a9ffb88288f11c03b0c24fe45f90879d8fbb83f9ba70649b489d8165f06d4484dd07c6e41c2d9616630781fd739a127d1285c589db3d77801afd30a9d35'
}

mongrel and rails 2.2.2 环境下报 mysql lib 的错误及解决方法

Processing Rails::InfoController#properties (for 127.0.0.1 at 2008-12-15 17:10:53) [GET]

LoadError (dlopen(/Library/Ruby/Site/1.8/universal-darwin9.0/mysql.bundle, 9): Library not loaded: /usr/local/mysql/lib/libmysqlclient.15.dylib
Referenced from: /Library/Ruby/Site/1.8/universal-darwin9.0/mysql.bundle
Reason: image not found - /Library/Ruby/Site/1.8/universal-darwin9.0/mysql.bundle):
/Library/Ruby/Site/1.8/universal-darwin9.0/mysql.bundle
/Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `require'
/Library/Ruby/Gems/1.8/gems/activesupport-2.2.2/lib/active_support/dependencies.rb:153:in `require'

在MAC OSX 10.5 和 mysql 5.1.23-rc 上，rails 2.2.2 用 mongrel server 启动时访问首页mysql连接属性时抛出以上错误，在对应的/usr/local/mysql/lib下根本没有/usr/local/mysql/lib/libmysqlclient.15.dylib这个文件，当然会加载失败，之前在 rails 2.0.2 上倒没有碰到过这个问题。从mysql官网重新下载了一个 mysql 5.0.67，从其下面拷了一个libmysqlclient.15.dylib 到 /usr/local/mysql/lib/libmysqlclient.15.dylib，就可以解决此问题。
$> sudo cp /usr/local/mysql5/lib/libmysqlclient.15.dylib /usr/local/mysql/lib/libmysqlclient.15.dylib

MySQL5.0 同步错误 errno 2013 及解决方法

081208 11:28:29 [ERROR] Slave I/O thread: error connecting to master 'repl@server:3306': Error: 'Lost connection to MySQL server at 'reading initial communication packet', system error: 113' errno: 2013 retry-time: 60 retries: 86400

主要是因为slave连接不到master，可以从以下几点着手解决:
1. iptables是否将对应的master db port给禁了？
2. master db server 是否能够上网？ slave db server 是否能够上网？

textarea 标签关闭方式不正确造成的问题

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>textarea 标签关闭方式差异</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
</head>
<body>
<table>
<tr>
<td>Description 1: 使用正常的textarea关闭标签(&lt;/textarea&gt;)</td>
<td>
<textarea class="textfield" style="width: 350px;" rows="6" name="description1"></textarea>
</td>
</tr>
<tr>
<td>Description 2: xml方式关闭textarea标签时，safari/firefox/opera都会出现渲染问题，textarea后面的全部内容都会被视作textarea的内容。IE未测试。</td>
<td>
<textarea class="textfield" style="width: 350px;" rows="6" name="description2"/>
</td>
</tr>
<tr>
<td>Description 3: </td>
<td>
<textarea class="textfield" style="width: 350px;" rows="6" name="description3"></textarea>
</td>
</tr>
</table>
</body>
</html>

discuz! 整站空白解决方法

将forumdata/cache和forumdata/templates下面的文件删除重建缓存。

Firebug command line api 和 console api 中比较常用到的几个方法

1. $(id) 与 prototype 用法类似，只能传字符串的Element Id。
2. $$(selector) 与 prototype 用法类似，传一个CSS Selector字符串，另专门还有一个$x("xPath")方法接受xpath方式查询DOM节点。
3. dir(object) 遍历object所有属性，在console中打印出来。
4. clear() 清空console。
5. debug(fn) 在对应的fn方法第一行加一个断点，当此方法调用时就会进入此方法第一行，可进行断点调试此方法。对应的有undebug(fn)取消断点。

6. console.log(object[, object, ...])，console是Firebug在Firefox中添加的一个全局变量名。其log()方法会将对象打印到firebug控制台中，支持类似printf()的功能。
7. 同console.log()类似的还有console.debug(),console.info(),console.warn(),console.error()方法。
8. console.assert(expression[, object, ...])断言功能，用来检查表达式是否正确执行。

Reference: http://getfirebug.com/commandline.html
http://getfirebug.com/console.html

MySQL Replication server_errno=2020

080927 15:28:42 [Note] Slave: connected to master 'test@localhost:3306',replication resumed in log 'mysql-bin.000003' at position 34699088
080927 15:28:42 [ERROR] Error reading packet from server: Got packet bigger than 'max_allowed_packet' bytes ( server_errno=2020)
080927 15:28:42 [Note] Slave I/O thread: Failed reading log event, reconnecting to retry, log 'mysql-bin.000003' position 34699088
080927 15:28:42 [Note] Slave: connected to master 'test@localhost:3306',replication resumed in log 'mysql-bin.000003' at position 34699088

$> vi /etc/my.cnf
# max_allowed_packet = 1M # modify it to
max_allowed_packet = 10M

MySQL server_errno=1236 problem and resolution

mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State:
Master_Host: test
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000045
Read_Master_Log_Pos: 78736775
Relay_Log_File: localhost-relay-bin.000032
Relay_Log_Pos: 78736912
Relay_Master_Log_File: mysql-bin.000045
Slave_IO_Running: No
Slave_SQL_Running: Yes
Replicate_Do_DB: search_production,dw_am
Replicate_Ignore_DB: mysql
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 78736775
Relay_Log_Space: 78736912
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: NULL
1 row in set (0.00 sec)

Check mysql error log file, get below error info:
080815 12:13:44 [ERROR] Error reading packet from server: Client requested master to start replication from impossible position ( server_errno=1236)
080815 12:13:44 [ERROR] Got fatal error 1236: 'Client requested master to start replication from impossible position' from master when reading data from binary log
080815 12:13:44 [Note] Slave I/O thread exiting, read up to log 'mysql-bin.000045', position 78736775

Because master bin log file size is 78736164, but slave want to read 78736775, cause mysql 1236 error number, This problem caused by log flush exception.

-rw-rw---- 1 mysql mysql 78736164 Aug 15 10:18 mysql-bin.000045

This problem can be resolved using below method:

mysql> STOP SLAVE;
mysql> CHANGE MASTER TO MASTER_LOG_FILE=[NEXT BIN LOG FILE], MASTER_LOG_POS=98;
mysql> START SLAVE;

[NEXT BIN LOG FILE] is 'mysql-bin.000046' in this problem, MASTER_LOG_POS value is always 98 or 4.

在调用actionLink组件中碰到的关于hibernate的连接错误

在tapestry5中做一个页面时碰到如下错误：
只要在这个页面中有使用actionLink组件并且传入了context值的时候，会涉及对应的ValueEncoder，程序总是会去通过org.apache.tapestry5.hibernate.HibernateModule.contributeValueEncoderSource去找hibernate.xml.cnf这个默认的配置文件去连接数据库。
当这个hibernate.xml.cnf文件里的配置不能连上数据库时就会在连接超时之后抛出以下错误，之后页面会正常显示，以后再次访问此页面就不会再连接数据库了，页面也是即时刷出来。如果配置文件能够连接上数据库，则会抛出下面第一行的[WARN]信息，连接不会超时，所以页面访问也不会受到影响。

[WARN] cfg.AnnotationBinder Package not found or wo package-info.java: com.test.www.entities
[WARN] cfg.SettingsFactory Could not obtain connection metadata
com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception:

** BEGIN NESTED EXCEPTION **

java.net.SocketException
MESSAGE: java.net.ConnectException: Operation timed out

STACKTRACE:

java.net.SocketException: java.net.ConnectException: Operation timed out
at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:156)
at com.mysql.jdbc.MysqlIO.(MysqlIO.java:276)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2666)
at com.mysql.jdbc.Connection.(Connection.java:1531)
....
at org.apache.tapestry5.hibernate.HibernateModule.contributeValueEncoderSource(HibernateModule.java:149)
....

ruby script/server lighttpd

在一个jruby on rails目录下面运行以下命令时报错:
$> ruby script/server lighttpd
.....
Couldn't find any pid file in '/Users/yu/Sites/RubyOnRails/tmp/pids' matching 'dispatch.[0-9]*.pid'
(also looked for processes matching "/Users/yu/Sites/RubyOnRails/public/dispatch.fcgi")
在lighttpd的log中看到如下信息：
2008-05-21 00:23:33: (log.c.75) server started
2008-05-21 00:23:33: (mod_fastcgi.c.1029) the fastcgi-backend /Users/yu/Sites/RubyOnRails/public/dispatch.fcgi failed to start:
2008-05-21 00:23:33: (mod_fastcgi.c.1033) child exited with status 9 /Users/yu/Sites/RubyOnRails/public/dispatch.fcgi
2008-05-21 00:23:33: (mod_fastcgi.c.1036) If you're trying to run PHP as a FastCGI backend, make sure you're using the FastCGI-enabled version.
You can find out if it is the right one by executing 'php -v' and it should display '(cgi-fcgi)' in the output, NOT '(cgi)' NOR '(cli)'.
For more information, check http://trac.lighttpd.net/trac/wiki/Docs%3AModFastCGI#preparing-php-as-a-fastcgi-programIf this is PHP on Gentoo, add 'fastcgi' to the USE flags.
2008-05-21 00:23:33: (mod_fastcgi.c.1340) [ERROR]: spawning fcgi failed.
2008-05-21 00:23:33: (server.c.908) Configuration of plugins failed. Going down.

经google后才发觉script/server lighttpd只能用于ruby on rails的项目上，通过以下命令：
$> /usr/local/lighttpd/bin/spawn-fcgi -f /Users/yu/Sites/RubyOnRails/public/dispatch.fcgi -p 12000 -s /tmp/rails-fcgi.socket
会得到成功的结果如下：
spawn-fcgi.c.197: child spawned successfully: PID: 2275
而在jruby的项目下调用spawn-fcgi则会报脚本错误。

另附dispatch.sh[reference: http://www.javaeye.com/topic/168989]

#!/bin/sh

DISPATCH_PATH=/Users/yu/Sites/cv2/public/dispatch.fcgi
SOCKET_PATH=//Users/yu/Sites/cv2/tmp/sockets
RAILS_ENV=developement
export RAILS_ENV

case "$1" in

start)
for num in 0 1 2
do
/Users/yu/Programs/lighttpd/bin/spawn-fcgi -f $DISPATCH_PATH -s $SOCKET_PATH/rails.socket-$num
done
;;

stop)
killall -9 dispatch.fcgi
;;

restart)
$0 stop
$0 start
;;

*)
echo "Usage: dispatch.sh {start|stop|restart}"
;;

esac

exit 0

macbook and sudo

when I test below command in termial:
$> sudo ls -l .
then terminal will ask me input password, but current user has no password, and terminal will output nothing after entered.

after give current user a new password:
$> passwd
old password, new password, confirm new password, then type command in terminal again:
$> sudo ls -l .
input new password and enter, then results output as expected.

lighttpd php fastcgi and 500 internal error

当访问php页面时，得到一个500服务器内部错误（500 internal error ），服务器端错误日志如下：

2008-04-23 23:20:50: (mod_fastcgi.c.1743) connect failed: Connection refused on unix:/tmp/php-fastcgi.socket-3
2008-04-23 23:20:50: (mod_fastcgi.c.2912) backend died; we'll disable it for 5 seconds and send the request to another backend instead: reconnects: 0 load: 1
2008-04-23 23:20:50: (mod_fastcgi.c.2471) unexpected end-of-file (perhaps the fastcgi process died): pid: 350 socket: unix:/tmp/php-fastcgi.socket-3
2008-04-23 23:20:50: (mod_fastcgi.c.3281) response not received, request sent: 872 on socket: unix:/tmp/php-fastcgi.socket-3 for /php/phpinfo.php , closing connection

用lighttpd fastcgi模式调用php时报以上错误，在lighttpd官方网站上查到，是因为php在编译时未指定--enable-fastcgi, 于是重新编译了最新版的php5.2.5：

./configure --prefix=/usr/local/php5 --with-zlib --enable-fastcgi --with-mysql=/usr/local/mysql --enable-mbstring --enable-sockets --enable-gd-native-ttf --with-snmp --enable-soap
make
sudo make install

重启lighttpd之后即可正确访问php文件。

hostname not match (OpenSSL::SSL::SSLError)

1. install soap4r
$> gem install soap4r
2. run soap request
driver = SOAP::RPC::Driver.new
driver.wiredump_dev = STDERR if $DEBUG
driver.wiredump_file_base = "soap_result"
......
3.get error as below:

C:/ruby/lib/ruby/1.8/openssl/ssl.rb:91:in `post_connection_check': hostname not match (OpenSSL::SSL::SSLError)
 from C:/ruby/lib/ruby/gems/1.8/gems/httpclient-2.1.2/lib/httpclient.rb:1052:in `post_connection_check'
 from C:/ruby/lib/ruby/gems/1.8/gems/httpclient-2.1.2/lib/httpclient.rb:1467:in `connect'
 from C:/ruby/lib/ruby/1.8/timeout.rb:56:in `timeout'
 from C:/ruby/lib/ruby/1.8/timeout.rb:76:in `timeout'
 from C:/ruby/lib/ruby/gems/1.8/gems/httpclient-2.1.2/lib/httpclient.rb:1454:in `connect'
 from C:/ruby/lib/ruby/gems/1.8/gems/httpclient-2.1.2/lib/httpclient.rb:1311:in `query'
 from C:/ruby/lib/ruby/gems/1.8/gems/httpclient-2.1.2/lib/httpclient.rb:932:in `query'
 from C:/ruby/lib/ruby/gems/1.8/gems/httpclient-2.1.2/lib/httpclient.rb:2131:in `do_get_block'
  ... 7 levels...
 from C:/ruby/lib/ruby/gems/1.8/gems/soap4r-1.5.8/lib/soap/rpc/proxy.rb:143:in `call'
 from C:/ruby/lib/ruby/gems/1.8/gems/soap4r-1.5.8/lib/soap/rpc/driver.rb:181:in `call'

4. google this problem and get resolution as below:
driver.options['protocol.http.ssl_config.verify_mode'] = OpenSSL::SSL::VERIFY_NONE
or
driver.options['protocol.http.ssl_config.verify_mode'] = 0
or
driver.options['protocol.http.ssl_config.verify_mode'] = ""
or
driver.options['protocol.http.ssl_config.verify_mode'] = OpenSSL::SSL::VERIFY_PEER
driver.options['protocol.http.ssl_config.ca_file'] = '/etc/ssl/certs/certification_authority.crt'
driver.options['protocol.http.ssl_config.client_cert'] = '/etc/ssl/certs/client.cert'
driver.options['protocol.http.ssl_config.client_key'] = '/etc/ssl/certs/client.key'

Reference: http://www.fngtps.com/2007/03/openssl-ssl-sslerror-with-soap4r-and-the-rubyforge-gem