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Dealing with “java.lang.OutOfMemoryError: PermGen space” error
...ution was to add these flags to JVM command line when Tomcat is started:
-XX:+CMSClassUnloadingEnabled -XX:+CMSPermGenSweepingEnabled
You can do that by shutting down the tomcat service, then going into the Tomcat/bin directory and running tomcat6w.exe. Under the "Java" tab, add the arguments to ...
Google Maps Android API v2 Authorization failure
...iddebugkey, 15.10.2012, PrivateKeyEntry,
Zertifikat-Fingerprint (SHA1): 66:XX:47:XX:1E:XX:FE:XX:DE:XX:EF:XX:98:XX:83:XX:9A:XX:23:A6
Then look at your package name of the map activity, e.g.
com.example.mypackagename
You combine this and check that with your settings in the Google API console:...
What does “Content-type: application/json; charset=utf-8” really mean?
...king
at the pattern of nulls in the first four octets.
00 00 00 xx UTF-32BE
00 xx 00 xx UTF-16BE
xx 00 00 00 UTF-32LE
xx 00 xx 00 UTF-16LE
xx xx xx xx UTF-8
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“java.lang.OutOfMemoryError: PermGen space” in Maven build [duplicate]
...you increase the MaxPermSize, as in example:
export MAVEN_OPTS="-Xmx512m -XX:MaxPermSize=128m"
(or on Windows:)
set MAVEN_OPTS=-Xmx512m -XX:MaxPermSize=128m
You can also specify these JVM options in each maven project separately.
...
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize
...e
edit MAVEN_OPTS Environment User Variable:
Java 7
MAVEN_OPTS -Xmx512m -XX:MaxPermSize=128m
Java 8
MAVEN_OPTS -Xmx512m
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How to specify JVM maximum heap size “-Xmx” for running an application with “run” action in SBT?
...r/local/etc/sbtopts along these lines:
-J-Xms512M
-J-Xmx3536M
-J-Xss1M
-J-XX:+CMSClassUnloadingEnabled
-J-XX:+UseConcMarkSweepGC
-J-XX:MaxPermSize=724M
-J-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005
You can also create an .sbtopts file in the root of your SBT project using t...
Shortest distance between a point and a line segment
...len_sq != 0) //in case of 0 length line
param = dot / len_sq;
var xx, yy;
if (param < 0) {
xx = x1;
yy = y1;
}
else if (param > 1) {
xx = x2;
yy = y2;
}
else {
xx = x1 + param * C;
yy = y1 + param * D;
}
var dx = x - xx;
var dy = y - yy;
ret...
Split (explode) pandas dataframe string entry to separate rows
...column:
In [46]: df
Out[46]:
var1 var2 var3
0 a,b,c 1 XX
1 d,e,f,x,y 2 ZZ
In [47]: explode(df.assign(var1=df.var1.str.split(',')), 'var1')
Out[47]:
var1 var2 var3
0 a 1 XX
1 b 1 XX
2 c 1 XX
3 d 2 ZZ
4 e 2 ZZ
5 f 2 ...
What's the Android ADB shell “dumpsys” tool and what are its benefits?
...ke conditions: 3
Internal state:
interface tiwlan0 runState=Running
SSID: XXXXXXX BSSID: xx:xx:xx:xx:xx:xx, MAC: xx:xx:xx:xx:xx:xx, Supplicant state: COMPLETED, RSSI: -60, Link speed: 54, Net ID: 2, security: 0, idStr: null
ipaddr 192.168.1.xxx gateway 192.168.x.x netmask 255.255.255.0 dns1 192.168...
What is the appropriate HTTP status code response for a general unsuccessful request (not an error)?
...
You should use 400 for business rules. Don't return 2xx if the order was not accepted. HTTP is an application protocol, never forget that. If you return 2xx the client can assume the order was accepted, regardless of any information you send in the body.
From RESTful Web Servi...
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