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No appenders could be found for logger(log4j)?
...ate to the folder that contains your log4j.properties file
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The error message should no longer appear.
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psql: FATAL: role “postgres” does not exist
...s using homebrew, see the comment from @user3402754 below.
Note that the error message does NOT talk about a missing database, it talks about a missing role. Later in the login process it might also stumble over the missing database.
But the first step is to check the missing role: What is the ou...
How can I plot with 2 different y-axes?
...yback machine
Two different y axes on the same plot
(some material originally by Daniel Rajdl 2006/03/31 15:26)
Please note that there are very few situations where it is appropriate to use two different scales on the same plot. It is very easy to mislead the viewer of the graphic. Check the foll...
How do I use a file grep comparison inside a bash if/else statement?
...grep:
Exit status is 0 if any line was selected, 1 otherwise;
if any error occurs and -q was not given, the exit status is 2.
if grep --quiet MYSQL_ROLE=master /etc/aws/hosts.conf; then
echo exists
else
echo not found
fi
You may want to use a more specific regex, such as ^MYSQL_ROLE=ma...
How to wait for a keypress in R?
...hod is that if you type something that is not a number, it will display an error.
print ("Press [enter] to continue")
number <- scan(n=1)
Wrapping into a function:
readkey <- function()
{
cat("[press [enter] to continue]")
number <- scan(n=1)
}
Method 3
Imagine you want to wa...
How to create a drop shadow only on one side of an element?
...;
}
<div id="box" class="box-shadow"></div>
UPDATE 3
All my previous answers have been using extra markup to get create this effect, which is not necessarily needed. I think this a much cleaner solution... the only trick is playing around with the values to get the right positi...
View's getWidth() and getHeight() returns 0
I am creating all of the elements in my android project dynamically. I am trying to get the width and height of a button so that I can rotate that button around. I am just trying to learn how to work with the android language. However, it returns 0.
...
How to stop a PowerShell script on the first error?
...
$ErrorActionPreference = "Stop" will get you part of the way there (i.e. this works great for cmdlets).
However for EXEs you're going to need to check $LastExitCode yourself after every exe invocation and determine whether th...
How can I interrupt a ServerSocket accept() method?
... was calling close() after I exited the loop.
– lukeo05
Jun 6 '10 at 10:35
4
Strange, that there ...
PHP Composer update “cannot allocate memory” error (using Laravel 4)
... Updating PHP is not a solution. I have 7.0.21, and still get this error.
– cj5
Aug 14 '17 at 17:30
@Kumar's s...