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Created by voodoo on August 03, 2012 08:42:38
Last update: August 03, 2012 09:31:25
The C function getsockopt lets you get the error codes with the option SO_ERROR . The possible error numbers are defined in the global errno.h . The relevant values are:
#define ETIMEDOUT 110 /* Connection timed out */
...
But here's the whole list on my Linux system ( /usr/include/asm-generic/errno.h ):
#ifndef _ASM_GENERIC_ERRNO_H
#define _ASM_GENER...
Created by Fang on March 15, 2012 10:24:35
Last update: March 15, 2012 10:24:35
Suppose that I have an email field annotated with:
@NotEmpty(message="Please enter email address")
...
Bean validation will trigger two errors when no email address is entered:
the email field is empty
an empty email field is not a valid email address
Displaying both errors to the user with <form:errors> would be redundant and confusing:
<%@ taglib uri="http://www.springframework.org/tag...
This is how to display the first error only:
<spring:bind path="emailAddress">
<c:if test="$...
Created by Fang on February 08, 2012 21:21:01
Last update: February 08, 2012 21:21:17
Just a reminder that I got this error when I set the Java system property javax.net.ssl.trustStore to a non-existing file (typo). The full error message when running Maven was:
[ERROR] java.lang.RuntimeException: Unexpected e...
Created by Fang on February 08, 2012 21:15:00
Last update: February 08, 2012 21:15:00
This was the error message:
[ERROR] sun.security.validator.ValidatorExceptio...
The certificate was actually signed by Verisign, but somehow failed to pass Java cert validation.
To resolve the problem:
Download the cert from the server (with RetrieveSSLCert , for example)
Import the certificate into the keystore:
$ keytool -import -trustcacerts -alias myserver -f...
Define MAVEN_OPTS :
$ export MAVEN_OPTS='-Djavax.net.ssl.trustStore=/h...
The quotes must exist for the value of MAVEN_OPTS , and the path must be absolute ( ~/etc/mavenKeyStore.jks does not work).
Created by Dr. Xi on February 06, 2012 09:20:20
Last update: February 06, 2012 09:20:20
This is the error message:
Error 6 initializing SQL*Plus
SP2-0667: Message...
It might be that the ORACLE_HOME environment variable is not properly set or a missing sp1<lang>.msb (for example sp1us.msb ) file. But for my Ubuntu system, there was no such thing as sp1<lang>.msb , and it wasn't caused by a missing ORACLE_HOME . The error was resolved after I restored the shared library file libsqlplusic.so .
Created by James on February 02, 2012 09:20:22
Last update: February 02, 2012 09:20:22
This example came from the jQuery validation documentation. The required rule can be used to validate a required selection box when you set the value of the first option to empty.
<!DOCTYPE HTML>
<html>
<head>
<scrip...
The error message is the title since no error message is specified. A more fully defined validation check would look like this:
$('#my-form').validate({
errorElement: "p",
...
Created by magnum on September 25, 2011 21:51:23
Last update: September 26, 2011 20:49:22
A simple socket client in C.
#include <stdio.h>
#include <stdlib.h>
#incl...
Created by Dr. Xi on September 19, 2011 11:56:42
Last update: September 19, 2011 11:57:26
It is well known that with the -D switch you can turn an ssh session into a socks proxy:
ssh -D localhost:8080 remote_user@remote_host
Now configure your browser to use " localhost:8080 " as a socks proxy and your web traffic is routed through remote_host via an ssh tunnel.
But sometimes you encounter an error message like this:
Disconnecting: Bad packet length - 1416586337
This is because sometimes, the ssh session outputs some "welcome" message into the tunnel, polluting the protocol stream between the client and the remote host.
A safer way to establish an ssh socks proxy would be:
ssh -N -D localhost:8080 remote_user@remote_host
Created by freyo on June 30, 2011 11:15:48
Last update: June 30, 2011 11:15:48
Install APK with adb :
$ platform-tools/adb install out/target/product/ge...
Error message in logcat:
D/PackageParser( 60): Scanning package: /data/ap...
The error was created by android.content.pm.PackageParser , which compares the android:minSdkVersion and android:targetSdkVersion attributes of the uses-sdk element of AndroidManifest.xml in the APK file against the SDK version of the device or emulator. The SDK version on the device has to be greater than that required by android:minSdkVersion .
In my case, since I built the package with AOSP, the target emulator has to be AOSP also. This is the relavant section in AndroidManifest.xml :
<uses-sdk android:minSdkVersion="AOSP"
...
And the relevant section in android.content.pm.PackageParser :
if (minCode != null) {
if (!minCode.equals(...
Created by magnum on May 06, 2011 12:26:14
Last update: May 06, 2011 12:26:14
The bash environment variable PROMPT_COMMAND contains a regular bash command that is executed just before the command prompt is displayed.
For example:
$ export PROMPT_COMMAND=a
bash: a: command not ...
The command a is not valid so you get the error message every time you hit enter.
Echo something before $PS1 :
$ export PROMPT_COMMAND='echo -n Hi!'
Hi!$
...
PROMPT_COMMAND is regularly used to change the xterm window title. You may find this in /etc/bashrc :
case $TERM in
xterm*)
if [ -...
