I have lots of log file in my home directory:
hs_err_pid2326.log
hs_err_pid2416.log
I believe it is a java error log file, how to remove it and stop creating them?
Java version:
[kelvin#localhost ~]$ java -version
java version "1.6.0_21"
Java(TM) SE Runtime Environment (build 1.6.0_21-b06)
Java HotSpot(TM) Server VM (build 17.0-b16, mixed mode
They are created if and when the JVM crashes; they're analogous to a core file, but contain a lot of Java-specific information. They're just text files, and you can delete them like you would any other files:
$ rm ~/hs_err_pid*.log
You can stop creating them by no longer crashing the JVM. Normally, such crashes are rare. Look at the files themselves in a text editor and they will contain some info about their origins.
These are Java crash (core) dump log files. Identify which Java process creates them by tracing and monitoring the PID.
Have a shutdown script to delete these files.
With systemd, create a script deleting those files, e.g. /home/user/cleanJavaLogs.bash:
rm /home/user/hs_err_pid*
Then create a service descriptor file /etc/systemd/system/clearJavaLogs.service containing:
[Unit]
Description=Clear Javascript "hs_err_pidnnnn.log" files on shutdown
DefaultDependencies=no
Before=shutdown.target reboot.target halt.target
[Service]
Type=oneshot
ExecStart=/home/user/cleanJavaLogs.bash
[Install]
WantedBy=halt.target reboot.target shutdown.target
and activate the service:
systemctl enable clearJavaLogs.service
Related
I'm trying to install Kafka message queue on Windows for testing purposes (not for production).
I found this article on how to install Apache Kafka 0.8 on Windows: http://janschulte.wordpress.com/2013/10/13/apache-kafka-0-8-on-windows/
It's a good article, but it's outdated, unfortunately.
Does someone know a way to achieve that?
Ok, it's finally not complicated :)
The only steps are:
Edit (2021/10) Latest versions of Kafka end up with an AccessDeniedException upon startup, and even when successfully started, throw the same error during log rotation. Kafka utilizes Java methods designed for Unix filesystem libraries, so installing Kafka in WSL2 is recommended (link to Confluent blog, but steps also applicable to Apache Kafka direct installation).
Old answer
Download Kafka and uncompress it somewhere nice (let's say C:/Kafka)
Install Cygwin
If using Cygwin, edit \bin\kafka-run-class.sh and at the end of the file, change
`exec $JAVA $KAFKA_HEAP_OPTS $KAFKA_JVM_PERFORMANCE_OPTS $KAFKA_GC_LOG_OPTS $KAFKA_JMX_OPTS $KAFKA_LOG4J_OPTS -cp $CLASSPATH $KAFKA_OPTS "$#"`
to
``exec java $KAFKA_HEAP_OPTS $KAFKA_JVM_PERFORMANCE_OPTS $KAFKA_GC_LOG_OPTS $KAFKA_JMX_OPTS $KAFKA_LOG4J_OPTS -cp `cygpath -wp $CLASSPATH` $KAFKA_OPTS "$#"``
In Environment Variables, Add java to your Path System Variable:
That's it.. you can now run ZooKeeper and Kafka servers and start playing with topics and stuff..
These are the steps I followed to run kafka on Windows
Install Zookeeper first (I downloaded v3.3.6) zookeeper-3.3.6.tar.gz
Extract Zookeeper and run this command in powershell/cmd \zookeeper-3.3.6\bin> .\zkServer.cmd Now this should up a Zookeeper instance on localhost:2181
Download Kafka binary version (I downloaded v0.10.0.1)kafka_2.10-0.10.0.1.tgz
Extract Kafka, time to modify some configs
Inside Kafka extraction you can find .\config\server.properties
In .\config\server.properties replace log.dirs=c:/kafka/kafka-logs
Note: Make sure to create those folders in relevant paths
Happy news: Now Kafka ships with windows .bat scripts, You can find these files inside ./bin/windows folder
Start powershell/cmd and run this command to start Kafka broker .\bin\windows\kafka-server-start.bat .\config\server.properties
DONE!, Now you have a running Zookeeper instance and a Kafka broker.
You will probably find that Kafka comes with Windows .bat files under the bin folder to help you run Kafka under windows. However, those bat files are not updated since version 0.8.0 and some of Kafka's logic has changed (regarding topics, etc.).
I have tried two ways to solve this problem. One is to use Cygwin or MinGW to simulate Linux environment and run the Linux shell script, but there would be tons of other problems related to path names. The other solution, which is simpler and come with less trouble, is to use the corrected version of Windows bat files.
Please refer to this blog post.
Download any binary version(I've downloaded kafka_2.11-0.10.2.0) of Kafka from https://kafka.apache.org/downloads
Extract it to any folder(I've extracted to "C:\Kafka")
Open Command Prompt
Go to the folder that you extract Kafka(C:\Kafka\kafka_2.11-0.10.2.0)
Run this command to start Zookeeper
.\bin\windows\zookeeper-server-start.bat .\config\zookeeper.properties
Run this command to start Kafka
.\bin\windows\kafka-server-start.bat .\config\server.properties
Now it works!
In version 0.9.0. there are scripts in "bin" folder for windows. You can use them.
Running From A windows Shell
As of April 2019, downloading Kafka from their website worked on Windows almost right out of the box
Downloading and using the windows version .bat files is described here:
https://kafka.apache.org/quickstart
I ran into two problems when I did this:
1) JAVA_HOME was set to an unsupported JDK which led to this kind of error
Exception in thread "main" java.lang.VerifyError: Uninitialized object
exists on backward branch 209
Replacing with JDK 11 solved the problem.
2) The JAVA_HOME must not contain spaces which caused a 'cannot find the specified file' error. To fix this I used a shortened path like set JAVA_HOME=C:\Progra~1\Java\jdk-11.0.1
Running From Cygwin
If instead of the .bat files, you want to run the .sh files from cygwin, there is actually quite a bit that needs to be done, and even after that there may be problems that come up later. I can't really recommend this option, but I do use it as it's pretty convenient for some purposes.
If your JAVA_HOME path contains a space e.g. "C:\Program Files\Java\Jdk..." you will see something like this:
bin/kafka-run-class.sh: line 305: exec: C:\Program: not found
One solution is to copy the jdk to a path without spaces, and change the Java home accordingly.
If you don't want to change the JDK location, you can change the cygwin env variable as follows:
JAVA_HOME="/cygdrive/c/Program Files/Java/jdk-11.0.1"
and change the line
exec $JAVA $KAFKA_HEAP_OPTS $KAFKA_JVM_PERFORMANCE_OPTS $KAFKA_GC_LOG_OPTS $KAFKA_JMX_OPTS $KAFKA_LOG4J_OPTS -cp $CLASSPATH $KAFKA_OPTS "$#"
to
exec "$JAVA" $KAFKA_HEAP_OPTS $KAFKA_JVM_PERFORMANCE_OPTS $KAFKA_GC_LOG_OPTS $KAFKA_JMX_OPTS $KAFKA_LOG4J_OPTS -cp $CLASSPATH $KAFKA_OPTS "$#"
There was another problem with the log parameters in kafka-run-class.sh and I had to replace the line
KAFKA_GC_LOG_OPTS="-Xlog:gc*:file=$LOG_DIR/$GC_LOG_FILE_NAME:time,tags:filecount=10,filesize=102400"
with
KAFKA_GC_LOG_OPTS="-Xlog:gc*"
And even after all these changes I occasionally run into problems of Kafka shutting down because of an incompatible windows style path in the logs directories as described here:
Kafka 1.0 stops with FATAL SHUTDOWN error. Logs directory failed
In short, you may be better off running the Kafka .bat scripts from the windows directory...
With Chocolatey and Powershell:
chocolatey.exe install kafka -> installs Kafka into C:\ProgramData\chocolatey\lib\kafka\tools\kafka_2.11-1.0.0\ - your version might differ of course
add C:\ProgramData\chocolatey\lib\kafka\tools\kafka_2.11-1.0.0\ to your powershell path using notepad $PROFILE
After restarting powershell kafka-console-consumer should work as a command.
You also need to install ssl.properties with keystore and truststore. Put them e.g. into C:\ProgramData\kafka and put that into ssl.properties (please note the escaping of the backslashes):
security.protocol=SSL
ssl.truststore.location=C:\\ProgramData\\kafka\\kafka-truststore.jks
ssl.truststore.password=PASSWORD
ssl.keystore.location=C:\\ProgramData\\kafka\\kafka-keystore.jks
ssl.keystore.password=PASSWORD
ssl.key.password=PASSWORD
client.id=console-test
Now things like kafka-consumer-groups --bootstrap-server SERVERNAME:9094 --command-config C:\ProgramData\kafka\ssl.properties --list should first pop up a firewall warning which you'd need to accept and then output a list of groups.
Kafka & Zookeeper have inbuilt Windows specific scripts as verified in the latest version. As mentioned in other other answers, the directory for windows scripts will be under kafka_2.12-2.4.0\bin\windows for Kafka. Zookeeper scripts are under /bin only but ending with "*.cmd"
There will be few minor additional steps you will have to do with ZooKeeper & Kafka like
Creating zoo.cfg for ZooKeeper
Configuring windows specific data directory for ZeeKeeper
Kafka comes with default configuration file & it has very good OS specific handling i.e. log.dirs=/tmp/kafka-logs but it will create that directory structure under C:/ directory seamlessly without failing.
It is also easy to quickly setup a Kafka Cluster with multiple Kafka Brokers on Windows with minor configurations. You can also create topics, publish/consume messages, verify topics/partitions etc. all from Windows Command Prompt. Here is a good detailed reference for the windows specific setup Kafka Setup on Windows OS | Basic Installation, Setup, Verification, Cluster Setup, Storage
I had configured Zookeeper and Apache Kafka on my Windows machine.
For Zookeeper, simply configure ZOOKEEPER_HOME and set the PATH also and then rename the zoo.sample.cfg to zoo.cfg and also change the path for dataDir in the zoo.cfg
For Apache Kafka, simply unzip and start the server from bin folder and start the Producer/Consumer from windows folder under the Kafka directory
I'm trying to install Kafka message queue on Windows for testing purposes (not for production).
I found this article on how to install Apache Kafka 0.8 on Windows: http://janschulte.wordpress.com/2013/10/13/apache-kafka-0-8-on-windows/
It's a good article, but it's outdated, unfortunately.
Does someone know a way to achieve that?
Ok, it's finally not complicated :)
The only steps are:
Edit (2021/10) Latest versions of Kafka end up with an AccessDeniedException upon startup, and even when successfully started, throw the same error during log rotation. Kafka utilizes Java methods designed for Unix filesystem libraries, so installing Kafka in WSL2 is recommended (link to Confluent blog, but steps also applicable to Apache Kafka direct installation).
Old answer
Download Kafka and uncompress it somewhere nice (let's say C:/Kafka)
Install Cygwin
If using Cygwin, edit \bin\kafka-run-class.sh and at the end of the file, change
`exec $JAVA $KAFKA_HEAP_OPTS $KAFKA_JVM_PERFORMANCE_OPTS $KAFKA_GC_LOG_OPTS $KAFKA_JMX_OPTS $KAFKA_LOG4J_OPTS -cp $CLASSPATH $KAFKA_OPTS "$#"`
to
``exec java $KAFKA_HEAP_OPTS $KAFKA_JVM_PERFORMANCE_OPTS $KAFKA_GC_LOG_OPTS $KAFKA_JMX_OPTS $KAFKA_LOG4J_OPTS -cp `cygpath -wp $CLASSPATH` $KAFKA_OPTS "$#"``
In Environment Variables, Add java to your Path System Variable:
That's it.. you can now run ZooKeeper and Kafka servers and start playing with topics and stuff..
These are the steps I followed to run kafka on Windows
Install Zookeeper first (I downloaded v3.3.6) zookeeper-3.3.6.tar.gz
Extract Zookeeper and run this command in powershell/cmd \zookeeper-3.3.6\bin> .\zkServer.cmd Now this should up a Zookeeper instance on localhost:2181
Download Kafka binary version (I downloaded v0.10.0.1)kafka_2.10-0.10.0.1.tgz
Extract Kafka, time to modify some configs
Inside Kafka extraction you can find .\config\server.properties
In .\config\server.properties replace log.dirs=c:/kafka/kafka-logs
Note: Make sure to create those folders in relevant paths
Happy news: Now Kafka ships with windows .bat scripts, You can find these files inside ./bin/windows folder
Start powershell/cmd and run this command to start Kafka broker .\bin\windows\kafka-server-start.bat .\config\server.properties
DONE!, Now you have a running Zookeeper instance and a Kafka broker.
You will probably find that Kafka comes with Windows .bat files under the bin folder to help you run Kafka under windows. However, those bat files are not updated since version 0.8.0 and some of Kafka's logic has changed (regarding topics, etc.).
I have tried two ways to solve this problem. One is to use Cygwin or MinGW to simulate Linux environment and run the Linux shell script, but there would be tons of other problems related to path names. The other solution, which is simpler and come with less trouble, is to use the corrected version of Windows bat files.
Please refer to this blog post.
Download any binary version(I've downloaded kafka_2.11-0.10.2.0) of Kafka from https://kafka.apache.org/downloads
Extract it to any folder(I've extracted to "C:\Kafka")
Open Command Prompt
Go to the folder that you extract Kafka(C:\Kafka\kafka_2.11-0.10.2.0)
Run this command to start Zookeeper
.\bin\windows\zookeeper-server-start.bat .\config\zookeeper.properties
Run this command to start Kafka
.\bin\windows\kafka-server-start.bat .\config\server.properties
Now it works!
In version 0.9.0. there are scripts in "bin" folder for windows. You can use them.
Running From A windows Shell
As of April 2019, downloading Kafka from their website worked on Windows almost right out of the box
Downloading and using the windows version .bat files is described here:
https://kafka.apache.org/quickstart
I ran into two problems when I did this:
1) JAVA_HOME was set to an unsupported JDK which led to this kind of error
Exception in thread "main" java.lang.VerifyError: Uninitialized object
exists on backward branch 209
Replacing with JDK 11 solved the problem.
2) The JAVA_HOME must not contain spaces which caused a 'cannot find the specified file' error. To fix this I used a shortened path like set JAVA_HOME=C:\Progra~1\Java\jdk-11.0.1
Running From Cygwin
If instead of the .bat files, you want to run the .sh files from cygwin, there is actually quite a bit that needs to be done, and even after that there may be problems that come up later. I can't really recommend this option, but I do use it as it's pretty convenient for some purposes.
If your JAVA_HOME path contains a space e.g. "C:\Program Files\Java\Jdk..." you will see something like this:
bin/kafka-run-class.sh: line 305: exec: C:\Program: not found
One solution is to copy the jdk to a path without spaces, and change the Java home accordingly.
If you don't want to change the JDK location, you can change the cygwin env variable as follows:
JAVA_HOME="/cygdrive/c/Program Files/Java/jdk-11.0.1"
and change the line
exec $JAVA $KAFKA_HEAP_OPTS $KAFKA_JVM_PERFORMANCE_OPTS $KAFKA_GC_LOG_OPTS $KAFKA_JMX_OPTS $KAFKA_LOG4J_OPTS -cp $CLASSPATH $KAFKA_OPTS "$#"
to
exec "$JAVA" $KAFKA_HEAP_OPTS $KAFKA_JVM_PERFORMANCE_OPTS $KAFKA_GC_LOG_OPTS $KAFKA_JMX_OPTS $KAFKA_LOG4J_OPTS -cp $CLASSPATH $KAFKA_OPTS "$#"
There was another problem with the log parameters in kafka-run-class.sh and I had to replace the line
KAFKA_GC_LOG_OPTS="-Xlog:gc*:file=$LOG_DIR/$GC_LOG_FILE_NAME:time,tags:filecount=10,filesize=102400"
with
KAFKA_GC_LOG_OPTS="-Xlog:gc*"
And even after all these changes I occasionally run into problems of Kafka shutting down because of an incompatible windows style path in the logs directories as described here:
Kafka 1.0 stops with FATAL SHUTDOWN error. Logs directory failed
In short, you may be better off running the Kafka .bat scripts from the windows directory...
With Chocolatey and Powershell:
chocolatey.exe install kafka -> installs Kafka into C:\ProgramData\chocolatey\lib\kafka\tools\kafka_2.11-1.0.0\ - your version might differ of course
add C:\ProgramData\chocolatey\lib\kafka\tools\kafka_2.11-1.0.0\ to your powershell path using notepad $PROFILE
After restarting powershell kafka-console-consumer should work as a command.
You also need to install ssl.properties with keystore and truststore. Put them e.g. into C:\ProgramData\kafka and put that into ssl.properties (please note the escaping of the backslashes):
security.protocol=SSL
ssl.truststore.location=C:\\ProgramData\\kafka\\kafka-truststore.jks
ssl.truststore.password=PASSWORD
ssl.keystore.location=C:\\ProgramData\\kafka\\kafka-keystore.jks
ssl.keystore.password=PASSWORD
ssl.key.password=PASSWORD
client.id=console-test
Now things like kafka-consumer-groups --bootstrap-server SERVERNAME:9094 --command-config C:\ProgramData\kafka\ssl.properties --list should first pop up a firewall warning which you'd need to accept and then output a list of groups.
Kafka & Zookeeper have inbuilt Windows specific scripts as verified in the latest version. As mentioned in other other answers, the directory for windows scripts will be under kafka_2.12-2.4.0\bin\windows for Kafka. Zookeeper scripts are under /bin only but ending with "*.cmd"
There will be few minor additional steps you will have to do with ZooKeeper & Kafka like
Creating zoo.cfg for ZooKeeper
Configuring windows specific data directory for ZeeKeeper
Kafka comes with default configuration file & it has very good OS specific handling i.e. log.dirs=/tmp/kafka-logs but it will create that directory structure under C:/ directory seamlessly without failing.
It is also easy to quickly setup a Kafka Cluster with multiple Kafka Brokers on Windows with minor configurations. You can also create topics, publish/consume messages, verify topics/partitions etc. all from Windows Command Prompt. Here is a good detailed reference for the windows specific setup Kafka Setup on Windows OS | Basic Installation, Setup, Verification, Cluster Setup, Storage
I had configured Zookeeper and Apache Kafka on my Windows machine.
For Zookeeper, simply configure ZOOKEEPER_HOME and set the PATH also and then rename the zoo.sample.cfg to zoo.cfg and also change the path for dataDir in the zoo.cfg
For Apache Kafka, simply unzip and start the server from bin folder and start the Producer/Consumer from windows folder under the Kafka directory
Rundeck service starts and goes to dead state after a while
Below is the output.
02:43:11 # rpm -qa | grep rundeck rundeck-config-2.6.9-1.21.GA.noarch rundeck-2.6.9-1.21.GA.noarch
02:43:59 # service rundeckd start Starting rundeckd: [ OK ]
02:44:07 # service rundeckd status rundeckd (pid 31637) is running...
02:44:48 # service rundeckd status rundeckd dead but pid file exists
02:44:14 # java -version openjdk version "1.8.0_262" OpenJDK Runtime Environment (build 1.8.0_262-b10) OpenJDK 64-Bit Server VM (build 25.262-b10, mixed mode)
Checking your original post here. It's a system network problem (java.net.BindException: Address already in use), another process is using your Rundeck TCP port, that's the reason why the Rundeck process dead on startup. You can identify "the another" process with lsof -i :4440 or reconfigure Rundeck to listen to another TCP port.
EDIT: Jabraj found the solution: downgrade to JDK 1.7.
I have faced the same problem and i resolved it by changing ownership to the rundeck related folders.
Remove the /var/run/rundeck.pid file in order to delete the zombie process.
Check for any other zombie process using lsof commmand.
Reownership the rundeck related folders (Owner should be rundeck)
Restart the rundeckd service.
Hurray!!! its running inside the container well.
4 steps to resolve rundeck issue
I've packaged my Play application using the sbt-native-packager Debian Plugin. I installed the .deb file using the typical sudo dpkg -i tyrion_1.0-SNAPSHOT_all.deb. Once I did that, it created the daemon user and group and started the process as per the following:
aczerwon#vps57610:~/work/tyrion/target$ sudo dpkg -i tyrion_1.0-SNAPSHOT_all.deb
Selecting previously unselected package tyrion.
(Reading database ... 53135 files and directories currently installed.)
Preparing to unpack tyrion_1.0-SNAPSHOT_all.deb ...
Unpacking tyrion (1.0-SNAPSHOT) ...
Setting up tyrion (1.0-SNAPSHOT) ...
Creating system group: tyrion
Creating system user: tyrion in tyrion with tyrion user-daemon and shell /bin/false
tyrion start/running, process 30525
Processing triggers for ureadahead (0.100.0-16) ...
I see a java process running at 50% - which is nuts because the app should be idle. I'm assuming it's using the application.conf configuration but I get a ERR_CONNECTION_REFUSED when I try to hit the website.
Process is Starting and Stopping
Watching top, I now see the CPU is pinned because the process is starting and dying over and over. The pid is changing and VisualVM can't see it - it's not listed.
A ERR_CONNECTION_REFUSED error is probably due to miss configuration of play. See sbt-native-packager docs and play pid configuration.
Example configuration
javaOptions in Universal ++= Seq(
// Since play uses separate pidfile we have to provide it with a proper path
s"-Dpidfile.path=/var/run/${packageName.value}/play.pid",
// setting the http port explicitly
"-Dhttp.port=9000"
)
For the high CPU utilization I would recommend profiling the app with VisualVM or MissionControl to see what's going on.
Update
For play applications the PID file must be named play.pid otherwise play doesn't start up.
I have installed zookeeper on my Linux server ubuntu 12.04 in some folder like abc/zookeeper/zkserver/bin/zkserver.sh start. this works fine and starts the server as expected but when i put this zkserver.sh file in /etc/init.d folder and copy the file in rc2.d folder for the reason to start-up zookeeper on system reboot. and when i run this command /etc/init.d/zkserver.sh start this is giving errors like:
JMX enabled by default
Using config: /etc/init.d/../etc/zookeeper/zoo.cfg
grep: /etc/init.d/../etc/zookeeper/zoo.cfg: No such file or directory
mkdir: cannot create directory `': No such file or directory
Starting zookeeper ... STARTED
The zkServer.sh is dependent on a certain directory structure and certain files being present. It is not supposed to be moved in isolation like that. It is also not supposed to be used as an init script.
Check if your zk download comes with the init script. Try looking at src/packages/rpm/init.d/zookeeper or similar, and use that one instead.