Sai's World

Alfred Netease Music Workflow Fix

2025-02-10T19:58:00.001+08:00

I was using alfred netease workflow for years, but after I changed a new laptop and downloaded the workflow, it does not work anymore. Finally I found out the reason and came out with a fix.

It turns out that my netease music is in English version and the workflow identifies those menus in Chinese, for example ：tell menu "控制" of menu bar item "控制" of menu bar 1

So the fix is to change those names to English according to the actual menu and menu items names, for example tell menu "Controls" of menu bar item "Controls" of menu bar 1.

Hope this would also help you.

IntelliJ Editor NNBSP problem

2024-01-18T16:34:00.007+08:00

Recently I start to use IntelliJ to coding, but I met a strange problem as shown above that there are special characters, which in my mind are garbage codes. How to remove them?

There a lots of posts. But let's first try OpenAI, let's see whether they know the answer well.

Below are the interesting dialogs between me and ChatGPT. Have fun!

But actually it's not correct, for example in my editor settings, "Show whitespaces" are already unchecked.

【Solutions】

Go to IntelliJ Settings -> Editor -> Advanced Settings,

Uncheck "Render special characters, such as control codes, using their Unicode name abbreviations.

We can see the contents are good now.

PS: It has been quite a long time since my last post. How time flies! But better late than never, and let's go back to the beautiful engineer world!

Adobe Reader Error "adobe failed to connect to a dde server"

2016-11-09T16:25:00.000+08:00

I met a problem that my Adobe Reader cannot open pdf files, and pops up an error: "adobe failed to connect to a dde server"

To solve this, simply open control panel->Adobe Reader->Modify, use repair model to fix the problem.

Strange spark problem: "Error:scalac: error while loading ..., Missing dependency bad symbolic reference..."

2015-09-07T18:22:00.003+08:00

I am very new to spark and try to develop it on Windows using IntelliJ. This kind environment is not typical environment for developing spark because normally people use Ubuntu + IntelliJ.

I copied a famous example from spark official example SparkPi, when run it in idea, it pops an error:

I did a lot of search but no luck there. Finally I find out that the problem is caused by my pom.xml settings.

 

    org.apache.spark
    spark-core_2.10
    1.4.1
    ${myscope}

The reason of doing this is because we don't to package spark-core jar file in our finally package, but when specify it as provided it cannot run locally. The details can be check in another post of mine:
IntelliJ "Provided" Scope Problem

The solution is that:
1. keep the ${myscope} value here
2. add pom.xml a variable called myscope


      compile

3. In maven part, keep the setting
clean install -Dmyscope=provided

Now the spark object can run successfully and also package as we expected.

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GitHub for Windows through Company Proxy

2015-08-29T10:14:00.003+08:00

GitHub is a very famous tool but I am just starting to use it... Shy... Because we come from ancient times in source codes management: ClearCase, SVN, (TeamForge), now it's time to embrace GitHub.

I have downloaded a windows version. GitHub for Windows... Maybe the best way is to use the command line which I will investigate later.

This is the tool GitHub for Windows, which can be obtained here: https://git-scm.com/download/win

The problem is that we are under company proxy and there is no option to change it. Luckily there is a solution.

1. Open the file
C:\Users\YOURNAME\.gitconfig

2. Add there two lines
[http]
proxy = http://YOUR_COMPANY_PROXY:8080

[https]
proxy = http://YOUR_CONPANY_PROXY:8080

OK, all set!

By I feel using command line is more convenient.

1. clone

git clone REPOSITORY URL
for example

2. update
1) cd to the folder for example Spark
2) git pull

For the turorial of Git, we can check the great website, many thanks to the author!
http://rogerdudler.github.io/git-guide/

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IntelliJ "Provided" Scope Problem

2015-08-11T14:20:00.002+08:00

IntelliJ is such a famous tool that lots of users saying that once you get used to it, you can never come back. To a Eclipse user, there is some learning curves to use IntelliJ. Today I met a interesting problem that exist only in IntelliJ.

The background is that I moved my project from Eclipse to IntelliJ, the project runs very well in eclipse but I used the same way to run in IntelliJ (short as idea), it throws the error like below:

I searched a lot and finally find that it's because the storm package in pom.xml is specified as provided.


 org.apache.storm
 storm-core
 0.10.0-beta1
 provided

The reason the package must be specified as provided is that the storm cluster already contains the storm jar file, if our package contains the storm jar file again, it will cause conflicts.

But according to the definition of provided from maven website: https://maven.apache.org/guides/introduction/introduction-to-dependency-mechanism.html

provided
This is much like compile, but indicates you expect the JDK or a container to provide the dependency at runtime. For example, when building a web application for the Java Enterprise Edition, you would set the dependency on the Servlet API and related Java EE APIs to scope provided because the web container provides those classes. This scope is only available on the compilation and test classpath, and is not transitive.

This is why there is no problem when compile but has problems during runtime.

Here we come to a dilemma: when run it in IDE (intelliJ) we need to scope to be compile, but when package it to deploy on cluster, we need it to be package scope. One way to solve this is each time we change the scope, but this is very annoying.

So here is the solution:

1. Set the scope to be a parameter, such as ${myscope}


 org.apache.storm
 storm-core
 0.10.0-beta1
 ${myscope}

2. create a mvn task
expand Lifecycle, right click an item for example install, and choose create Practise...

then specify command line: clean install -Dmyscope=provided

With this, it's running very well and also can package with provided scope!

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Good tool Java Decompiler - View source codes from jar or .class file

2015-07-31T14:43:00.001+08:00

One problem of using SVN is that you might meet conflicts and end up losing your own codes. I met the problem once: I did an update, and there are conflicts. I tried to revert the update but found out that the revert is reverting my local change but keep the update! Now I lost my local development work...

Luckily I have a compiled jar file which I build last time, but they are all .class files. How to view the original files?

Java Decompiler comes to the resue!
http://jd.benow.ca/

Use this tool to open a jar file or .class file, you will see all the contents:
It's structured and clear! Thanks to the author!

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Hello Spark - How to configure Spark development environment on Windows with IntelliJ

2015-07-14T00:01:00.000+08:00

1. Install prerequisites

a) JDK 1.7

Download it here

b) Scala 2.10.5

Download it here

3) Maven latest version

Download it here

4) SBT

Download it here

After install or unzip these components, configure them in the system variables, for example:
JAVA_HOME --> C:\Program Files\Java\jdk1.7.0_60
MAVEN_HOME --> D:\Program Files\Dev\apache-maven-3.2.3
SCALA_HOME --> C:\Program Files (x86)\scala
SBT_HOME --> C:\Program Files (x86)\sbt\

and append the following items in PATH
%JAVA_HOME%\bin; %MAVEN_HOME%\bin;%SCALA_HOME%\bin;%SBT_HOME%\bin;

2. Download and setup IntelliJ IDE

a) Download IntelliJ here

b) Download Scala plugin

Note: it's mandatory to enable HTTP proxy if you are in a company firewall.

c) Configure Maven settings if under proxy

We can copy a settings.xml file from %MAVEN_HOME%\conf\settings.xml, and when it's under proxy, please copy it to C:\Users\*****\.m2 , and enable proxy

After modification:

3. Create project

Let's create a sample project called HelloSpark

1) File --> New --> Project..., please choose Scala

After click Finish, it will pop up a dialog, we can choose "New Window"

2). Add maven support

Right click project name and choose "Add Framework Support...", please scroll down and select "Maven"

Double click pom.xml and add the following content with existing content of pom.xml

    
        
        
            maven-compiler-plugin
            3.1
            
                1.7
                1.7
            
        
        
    

       
        
        
            org.apache.spark
            spark-core_2.10
            1.4.0
            provided
        
        
        
            org.apache.spark
            spark-mllib_2.10
            1.4.0
            provided
        

        
        
            org.apache.spark
            spark-sql_2.10
            1.4.0
        

        
        
            org.apache.spark
            spark-hive_2.10
            1.4.0
        

        
        
            org.apache.spark
            spark-streaming_2.10
            1.4.0
            provided
        
        
            org.apache.kafka
            kafka_2.10
            0.8.1
            provided
        
        
            org.apache.spark
            spark-streaming-kafka_2.10
            1.4.0
        
    
 
    
        
            Maven
            http://repo1.maven.org/maven2
        
        
            clojars
            http://clojars.org/repo/
        
        
            m2.java.net
            Java.net Maven 2 Repository
            http://download.java.net/maven/2
            default

Hello
A sample pom.xml can be viewed here

After pasted the content, on the top right it will pop up a dialog, please choose Enable Auto-Import and maven will start downloading specified dependencies.

Or you can do it via
right click project name--> Maven --> Reimport

3) Create a folder for scala

expand project file structure, src--> main, right click main, New--> Directory,
name it as Scala

Then add this new folder "Scala" to project source
File--> Project Structure (shortcut Ctrl+Alt+Shift+S)

Modules--> scala -->Source , and as the screenshot shows, Click 1, 2 and 3, the result will display 4.

4) Create a scala class

Right click scala folder, new Scala class

Add modify the content as the screenshot.
Also please be noted
1) org.apache.spark.SparkContext need be imported.
2) create a file called pagecounts,
3) This program is to read the content from a file named pagecounts, and then print out the first 10 lines, and also print out the total line counts of this file.
You can put arbitrary content in pagecounts, a sample file can be viewed here. If you place in another folder, please modify the file path accordingly.

5) Add Spark jar file

We need to download and Spark latest package and unzip it
Go to: https://spark.apache.org/downloads.html
Downoad spark package, you can choose 2.4 or 2.6 based on your requirement. For example, a sampe spark-1.4.0-bin-hadoop2.4.tgz can be downloaded here.

After unzip, we can add the package in our project, click OK with the popup.

6) Set run configuration

in the IntelliJ menu, Run-->Edit Configuration, please choose Application and set up the content as the screenshot below

Final: Run it!

Click the run button on the toolbar, and the result is good!

Please note that in the beginning it will display SLF4J multiple binding problem and Winutil problem like java.io.IOException: Could not locate executable null\bin\winutils.exe in the Hadoop binaries. These can be ignored for now.

Happy Spark!

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Nexus 5 OTA after rooted and TWRP installed

2015-05-02T11:15:00.001+08:00

I have been using Nexus 5 for quite a long time, and it's great to frequently receive update notification from google to get me the latest version of Android OS. We often joke that as a Nexus user, we paid for the system and get the device for free.

The update is called OTA (Over The Air). But since google changed its policy of verifying whether an OTA can perform or not, our lives become hard. In short, most of Nexus users will root the device, unlock bootloader and flash third party recovery for instance TWRP. (With this, you have most of controls of the Android OS and install lots of applications.) After done these, the system files will be changed. Google now changed the OTA policy to not only check some of the files are original version but check the whole system partition, which means in our case the OTA check will definitely fail and cannot run the update.

Below is a sample error:
expects build fingerprint of google/hammerhead/hammerhead 5.0.1/LRX22C/160258:user/release-keys or google/hammerhead/hammerhead 5.1 LMY47D/1743759 user/release-keys
this device has Android/omni_hammerhead/hammerhead:4.4.4/KTU84P/4ef4c299f5:eng/test-keys

When what to do?

I had a lot of pain trying different methods, each time failed by the phone cannot boot and I have to reinstall the whole factory image, which means I have a complete fresh OS and have to install all the applications! So each update I need to spend days to get my phone ready, this is really hard.

During this Labors' Day vacation, I decide to study this problem and luckily I found a solution.

First of all,
Don't try the sideload, don't try to use TWRP to install... I have tried all these and they failed. :)

Solution:

1. Download Nexus Root Toolkit and update it to the latest version
2. click

3. Very importantly, very importantly, very importantly CHECK don't flash userdata

Then follow all the instructions to flash, after this is done, phone will boot and updates all the application. Last but not least, flash the latest custom recovery and the latest Super

Enjoy the latest Android!

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Apache Commons CLI not working? No, it's a junk character problem

2015-04-23T20:40:00.003+08:00

I am using Apache command line interface to accept run time parameters.

While in my code, I am using -t to specify run time topology name.
But to my surprise, it didn't work. I took 2 hours to debug this problem and finally by chance I compare the result and find our that

It's complaining about the - character. What is wrong with it?

I used Notepad++ and there is good plugin called HexEditor and it gives our the answer

This is causing strange problem.

You may ask why. This is because when someone sent me the command from Outlook, it was already junked.

OK. the lesson and learn here is to be careful of the characters you pasted from Outlook, especially when it's in Chinese environment. We may try to type the command again to avoid problems.

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Strange Supervisorctl Problem: unix:///tmp/supervisor.sock no such file

2015-03-23T18:13:00.002+08:00

I am using supevisord which is a great tool to spawn processes

http://supervisord.org/running.html

When I get things configured, I run supervisor with the command below:

supervisord -c /etc/supervisord.conf

Supervisor runs successfully and I can see programs got started, but when I check processes using

supervisorctl status

I got an strange error as below:

I tried several solutions for example change supervisord.conf ot use http socket

It even reported an refuse connection error.
supervisorctl status http://127.0.0.1:9001 refused connection.

I searched a lot and finally got the solution.

Problem:
I was using a old version of supervisord.conf file, people who work on clusters and do maintenance work often do this. But the problem happend because I did a fresh install of supervisord, and copied a supervisord.conf from another machine. The install is the latest version, and the copied one is old, which caused the problem.

The solution is very simple:

echo_supervisord_conf > /etc/supervisord.conf
#modify supervisord.conf, after it's done
sudo supervisord -c /etc/supervisord.conf
sudo supervisorctl status

The first line generates a new supervisord.conf which is a template, and then you can modify with the programs you want to start. And then start supervisord and check status. The result is good.

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Storm slf4j multiple binding problem

2015-03-20T17:10:00.002+08:00

We are using Storm 0.9.3 and when we try to start supervisor node we found it reported the error below:

Clearly this is a slf4j multiple binding problem. Basically this famous library is used in different jars, when there are multiple slf4j find in the path only one will be picked up so that some jars called in a different version of slf4j will cause these compatibility problems.

For the log above it clear states that there are 3 slf4j bindings under lib

slf4j-jdk14-1.5.6.jar
slf4j-nop-1.5.3.jar
logback-classic-1.0.13.jar

And it needs 1.6 above as it said

SLF4J: slf4j-api 1.6.x (or later) is incompatible with this binding.

SLF4J: Your binding is version 1.5.5 or earlier.

SLF4J: Upgrade your binding to version 1.6.x.

Storm is compiled and tested, why it will have multiple slf4j* jars? The actual result is Storm vanilla package is good, but we add some jars to its lib folder:

So that when we package our Storm jar, we don't need each time to include all the packages it required, this is to save time: we develop on windows and upload developed package jar into cluster, if we can have a smaller generated jar file we save our time.

Let's not judge whether this method is good or not, but the problem here is to solve the binding problem.

The solution is simple:

From eclipse dependency

Let's remove these two jars which are slf4j 1.5.*

slf4j-jdk14-1.5.6.jar
slf4j-nop-1.5.3.jar

It can successfully launch now.

Then here comes another question: when we package Storm application, we want solve the slf4j multiple binding problem?

There is a nice pom.xml for you to reference (partial of pom.xml), this is what I searched and copied from internet, honor and thanks go to the original author.


 org.codehaus.gmaven
 gmaven-plugin
 1.5
 
  
   package
   
    execute
   
   
    
    File targetDir = new
    File("${project.basedir.path}/target".toString())
    println "dir is ${targetDir.path}"
    String jarBaseName = "${project.artifactId}-${project.version}"
    File jarWithUnwantedStuff = new File(targetDir,
    "${jarBaseName}-jar-with-dependencies.jar".toString())

    def explodedJarDir = new File(targetDir, "explodedJar".toString())
    def ant = new AntBuilder() // create an antbuilder
    ant.unzip(src: "${jarWithUnwantedStuff.path}",
    dest: explodedJarDir.path,
    overwrite: "false")
    File finalJar = new File(targetDir, "${jarBaseName}-deployable.jar")
    unwantedClassesDir = new File(explodedJarDir,
    "/org/slf4j/impl".toString())
    unwantedClassesDir.deleteDir()
    ant.zip(basedir: explodedJarDir.path, destFile: finalJar.path)

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Anroid Emulator Genymotion Connect to Internet

2015-02-15T14:28:00.005+08:00

We have attended an Android training class and the lecturer told us that Genymotion is so far the best Android emulator.

https://www.genymotion.com/

I have setup a device as shown above: Nexus 5 and it can successfully run. But the problem is, when I am in company, I cannot access the network. But you can see on the top the WiFi icon shows connection is successful.

I searched and finally found out a solution.

1. Click and hold the Connected WiFi (typically the name is WiredSSID) for 2 or 3 seconds.

2. Choose modify network

3. Specify the proxy hostname and port, then click Save

4. Now you can web surf!

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HP ALM Manager Cannot Start "Main application process failed to start Contact your system administrator"

2015-02-12T17:41:00.000+08:00

Our ALM system upgraded to ALM 12 and I tried to use new URL in Internet Explorer but...
error message:

I am using Windows 7 and finally I found a solution.

In Windows XP: it's "%USERPROFILE%\Local Settings\Application Data\HP ALM-Client"
In Windows 7: it's "%UserProfile%\AppData\Local\HP\ALM-Client"

Fix
- Make sure that user has Write permission on the ALM client installation folder.
- Delete this folder
- Then close IE, then go to the IE icon in the start menu, right-click on the IE icon and select “run as administrator” from the menu.

In my Windows 7 environment, I go to C:\Users\{user}\AppData\Local\HP\ALM-Client

delete the recent generated folder and then launch IE as an administrator

It's back running again!

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Problems in YARN: Why only SecondaryNameNode started? [Solved]

2015-01-30T14:26:00.002+08:00

I was configuring a YARN cluster and after all set I tried to start services.
./start-dfs.sh
./start-yarn.sh

To my surprise, I only see SecondaryNameNode service got started. What? I didn't configure the SecondaryNameNode service, also where is my NameNode service which I really want?

I also checked the log and it says that:

The log shows that port 50070 already in use. But I run a command:

lsof -i:50070

There is nothing there using the port.

Also the host address is 0.0.0.0, this seems very wrong.
I checked many posts and they all didn't guide me to the root cause. Finally I found out the root cause

[Solution]

in hdfs-site.xml, there is one entry that's necessary:


dfs.http.address
myHostNodename:50070

If you want your secondary namenode, please add another one


dfs.secondary.http.address
my2ndHostNodename:50090

Happy World!

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Storm Supervisor Error - kill ***: No such process

2015-01-20T16:41:00.002+08:00

My Storm cluster has 4 nodes: 1 nimbus node and 3 supervisor nodes. When I was trying to start supervisor using the command:

storm supervisor

It's strange that 2 supervisors got started successfully but 1 supervisor not. When I check the log:

It is saying lots of kill ***: No such process errors. After some search I find it's an error caused by workers not get started.

When checking the log of one of the worker $STORM_HOME/logs/worker-****.log

It shows that worker died, because there are missing information from zookeeper, which comes from unexpected shutdown of the storm nodes.

The solution is this:
1. Kill all the running topology (I did this step but not sure whether this is an mandatory step)
2. Clear the supervisor data information in storm data folder, for example my storm data is /opt/mount/data/storm-data, and there is a folder called supervisor and maybe one called worker, please delete both of them.

The storm data location is defined in the storm.yaml file,

After all these, start storm again, and it's running happily!

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[Solved]HBase Java program Joda time problem - NoSuchMethodError: org.joda.time.DateTime.now()

2015-01-06T00:09:00.002+08:00

I am writing a HBase program and use Joda time as my time type. I have a simple api call

System.out.println(DateTime.now()) which DateTime was imported as

In Eclipse the code is compiled successfully, but when I tried to execute it it poped up a strange error: NoSuchMethodError: org.joda.time.DateTime.now()

What? DateTime.now() is a well-known API and I check the source code, it's available since Joda jar 2.0, in my maven dependency it clearly shows that my joda jar library is 2.0. Then I even manually added a latest version which is version 2.6 and clearly see that the 2.6 version is picked up.

But, the problem still exists. What's wrong with Joda?
Then I see that in my project, I also have storm-core api, which also has a joda-time dependency, so I exclude it. Now I see that
in Eclipse the DateTime also has library, and it points to jruby-complete-1.6.8.jar, then it tells me whether the problem is.

Root cause:
1. my HBase program imported external jars, one of them is jruby-complete-1.6.8.jar, which internally has a joda-time reference, but it's a very low version.

2. somehow this version got picked up and makes DateTime.now() has a problem as it's only available after 2.0

Solution
1. remove the external library jruby-complete-1.6.8.jar in Java Build Path (as the screenshot above, choose the jruby-complete-1.6.8.jar and click Remove)
2. Use maven to add jruby-complete-1.6.8 dependency

org.jruby
jruby-complete
1.6.8
provided

3. Add Joda-time dependency and make sure it comes first as the screenshot below shows

joda-time
joda-time
2.6

DateTime.now() is a wonderful world!

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[Solved] SecureCRT Public Key Dialog - A public key file has not been specified

2014-12-12T15:48:00.001+08:00

SecureCRT is an excellent tool that can help us manage multiple sessions. There is a free and famous tool called putty, but in my opinion SecureCRT is much better.

But there is one thing which is annoying:
when connecting to a new server, it always popup a public key dialog "A public key file has not been specified for this session. Would you like to specify one now?"

Then I have to click now and go on, which is really wasting time.

To solve this, we can set up a SSH key, but also way can do these steps by only use password authentication:

1. right click a session and view its properties

2. Unselect the "PublicKey" dialog

After save the annoying dialog will be gone. Save my life for 3 seconds each time, although I wasted too much.

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[Solved]Eclipse Font Problem

2014-08-04T14:40:00.002+08:00

I met an eclipse font problem that the tab header looks very uncomfortable, as shown below:

The text font a little ugly and is different from the menu bar like the Windows menu or Help menu. I tried to modify the font settings in preference but didn't make it: there are many items in font settings and I don't know which is exactly the one I need to modify and I tried a few but didn't work.

Finally I happened to find a solution: this is controlled by Theme settings.

The solution is to change the appearance to Windows 7.

After I made the change and restart, it looks like below:

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Save Power: Windows Scheduled Sleep and Scheduled Wake Up

2014-07-14T12:44:00.001+08:00

I have got two laptops, and I plan their roles as: one in the office and the other at home, and I can remote desktop to each other using a great tool called TeamViewer. But here comes a problem that I don't want these two laptops to be always running because I think this would affect laptop's health and in another way this is not necessary during some time frame for example when I sleep this laptop should be turned off to save power.

HP ZBook 15 Workstation HP EliteBook 8470p

In short, I want to make the laptop to automatically sleep and automatically wake up at my configured time.

Part I: Scheduled Sleep
Solution: Windows Scheduled Task

1. Run taskschd.msc or click Scheduled Task in program files.

Give it a name for example 'Scheduled Sleep' here,
Select Run whether user is logged on or not, so that when first time reboot it can still run
Check Run with highest privileges if you want

2. In Triggers tap, configured the schedule

Here I make it run daily

3. The action Tap, configure the command

Rundll32.exe Powrprof.dll, SetSuspendState Sleep

4. In conditions tab, configure it as run only is plugged with AC power

5. Last but not least, when you run it, it will popup a dialog and please type your NT password and save.

Part II: Scheduled Wake up
Scheduled wake up is very challenge. I have searched a lot of posts and tried to configure through scheduled task but it didn't work. Luckily I found a tool which is simpler but very useful.

This is a freeware, WakeUpOnStandBy which you can download from here http://www.dennisbabkin.com/wosb/

The configuration is very straightforward.

Configure the wake up time
Check Turn screen on
Select every day so that it will run every day
Click Start to make all the configuration take effect

The last step is that to make sure the wakeuponstandby application is running when you login windows by drag the shortcut of this application under Startup.

All set. Test Passed. Happy World!

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Finally, My Microsoft OneNote Online!

2014-06-27T12:12:00.000+08:00

OneNote, without doubt is the best notebook in industry, and I have been using it since 2009. But there comes a problem that how I can sync my notes among different devices.

Microsoft gives out the solution to use OneDrive, how ever I just could not make it work.

In my OneNote, there is no place that I can switch account or use online folder etc.

When I tried to open a note file stored in OneDrive with my desktop OneNote.exe (by default it will be opened by online OneNote), I got an error like this:

The solution is to edit Registry settings.
HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Common\signin:signinoptions

Change this value from 3 to 1

Please review the link for details:
http://answers.microsoft.com/en-us/office/forum/office_2013_release-office_install/office-2013-office-account-signin-feature-disabled/d086ea41-431a-4798-b46a-2ebcd25b7cb7

The prerequisite step is to upload your OneNote notes files to OneDrive, and then login using our OneDrive account and it automatically pops up and you can choose a note you want.

Good to go!

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Strange maven-compiler-plugin Error when importing project

2014-06-23T15:49:00.003+08:00

This problem cost me about 3 hours and finally I found a solution.

Let me describe the background. I have got a new laptop and want to set up a development environment: for eclipse I copied from my old machine and when I wanted to import a maven project, a strange problem happened:

Now it is fixed so the screenshot below looks good, but at that time, it was saying: maven-compiler-plugin 2.5.1 missing ...

I continue with the errors, but the project crashed no matter how I add dependencies.

I have tried to re-install eclipse, install maven, use different java version, use other versions of maven-compiler-plugin... None of them worked.

Here is the ultimate solution:
Delete the local repository settings by deleting the repository folder in .m2 (C:\Users\yourid\.m2\repository)

After restart eclipse and re-import the maven project, it is all solved.

Happy using new computer!

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Use Apple Keyboard in Windows

2014-06-23T14:13:00.002+08:00

I have bought an apple MB110LL/B keyboard (someone called it apple G5) and I want to use it in windows 7. I found that my function keys do not work very well.

To well use it in windows, we have a software called SharpKeys

The step is: click Add, and then click 'Type Key' button, and on the right, select the actual key you want it maps to.

Logout and login again, it will take effect.

Useful Tips:

Clear on the Numeric Keypad is the 'num lock key' in windows.

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[Solved]Chrome cannot access Internet

2014-04-01T14:42:00.002+08:00

All of a sudden I found my Chrome cannot access internet. In the beginning I thought it's a network problem, especially when I was in office using company proxy.

But I found that Internet Explorer is running, and even Chrome Canary is working normally.
https://www.google.com/intl/en/chrome/browser/canary.html

I looked at all posts by didn't find any working solution.

Luckily I found out the root cause:
when I go to chrome-->Settings-->Advanced Settings
I found that change proxy settings is grayed out and it says "Your network proxy settings are being managed by an extension"

This makes me realize that there must be one extension that hijacked my network traffic. Then it is simple:
I found it's a AD blocker I am using, and I simply need to disable it.

Chrome is working well again.
For people might have similar problem, please check the extension you are using if Chrome cannot access internet, and you don't need to do things like uninstall and reinstall Chrome etc.

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Outlook leaves a bacground task running when shut down

2014-03-21T14:07:00.003+08:00

When writing programs, I like to turn off Outlook so I would not be distracted by new coming emails, however recently I found a problem with Outlook:
Even I closed Outlook, it is still running in a background. You can launch windows task manager and see OUTLOOK.exe process there. Yes, when there are new emails it still alert me which is a little annoying.

I searched and found out that this problem has a big chance to be caused by Outlook plugin. You can try the solution below which is from Microsoft:

1. Close Outlook and kill OUTLOOK.exe in windows task manager
· Press the windows key+R on the keyboard to open the Run window.
· In Run window and type outlook /safe
Note: There is a space between 'outlook' and '/'.

2. If you are able to work with Outlook without any problem then the issue might be due to add-ins. In order to disable the add-ins follow the steps given below:

· In Outlook, click on File< Options< Add-ins.

· Under Manage select COM Add-ins.

· Click on GO options beside Manage, uncheck all the add-ins and click Ok. (You you can uncheck the add-ins you don't think you need most of the time)

· Try to open Outlook and check if it works fine.

I now can have it Outlook cleanly closed.

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