GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. The metrics endpoint is serving metrics properly, but there is nothing related to cassandra in there as it has not yet started and is not accepting connections.
The result of sudo service cassandra status is could not access pidfile for Cassandra And then kill the cassandra thread by pgrep -f cassandra sudo kill -9the cassandra start to running. The cassandra version is 2.
Using JMX with Solr
Between the first one and second one, I run sudo kill -9but the kill operation make the cassandra load the -Dlogback. CassandraDaemon correctly. I br tag in react several time, the result is same. The service stop and restart not work after I start it, so I try to kill the process to recover with jmx exporter 0. I have the trouble two. I have managed to isolate the issue, which gets surfaced by any cassandra version earlier than 3.
The reason why 3. This was introduced when the exporter started to make use of simple HTTP server instead of jetty. If you run the command above, you will see that the command will never exit and you can even issue requests to port meaning that the server is still running. I'm observing the same issue with Cassandra 2.
It just hangs and Cassandra never starts. For reference, daemon threads in Jetty was introduced in If JMX exporter is killed, the Tomcat boots up well and starts serving requests. So temporary resolution seems to be. This resolved the issue. The odd thing is that the issue is random. We could reproduce it only on some machines that too not all the time.
Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Sign up. New issue. Jump to bottom. Copy link Quote reply. This comment has been minimized. Sign in to view. It sounds like there's something more going on there.Keep up to date with the coolest technology news, analysis and reviews from industry experts.
We will not share your email address. Like most application servers, WebSphere 8.
Problem with monitoring with JMX
In fact, the WebSphere administration console uses JMX to connect to the server to issue queries and perform administrative operations. While there is a lot of information out there on how to connect to WebSphere via JMX, most of the examples involve either disabling SSL, or worse — disabling security globally.
Like most things WebSphere, this could look very daunting at first, but once done, you will have a reliable and secure setup. Step 3. Step 4. Step 5. Step 6. Step 7. Restart the server. From the command line, go to your server profile folder, e.
It is expected to work with any MBean server. For this reason, we need to tweak the environment a little bit in order to make the WebSphere-specific classed known to JConsole.
Once you run the script, JConsole should open and connect to the server. Enter your administrator credentials when prompted:. Feel free to explore the properties and administrative operations provided by the server:.
In a future post, we will take things a step further by using the Monitis JMX monitor to gather metrics from WebSphere and upload them to your Monitis account. Until then, happy monitoring! Monitor your websites, servers, applications and more Search for:. Subscribe to our blog We'll send our articles straight to your email inbox regularly! Subscribe and get the Latest on Tech News Keep up to date with the coolest technology news, analysis and reviews from industry experts.
Waiting for stop status. Waiting for initialization status. ADMUI: Server server1 open for e-business; process id is After what seems like an eternity, your server will come up. Step 8. You might also like. Saving Time with Cloud-based Monitoring. Improving ASP. All-in-one monitoring Monitor your websites, servers, applications and more Start monitoring now No credit card required.
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Is there an example of how to gather monitoring data directly from JMX with a mini probe? Usually, PRTG monitors systems agentless so you do not have to install any software on target devices. Agentless monitoring brings a lot of advantages for you because it is easy to set up and you do not have to maintain anything, but some situations require other methods than agentless.
Tomcat monitoring with JMX
However, this shows that installing a small piece of software on the target system might be a better idea in order to monitor data more easily. You are completely free in implementing and adjusting mini probes depending on which monitoring data you need. Note: This article is provided for your information only. The steps described here have been tested carefully. However, we cannot offer deep technical support for customizing this proof of concept nor for writing your own mini probes.
You are free to use the Mini Probe API in order to implement probes and the corresponding sensors for any application scenario. So the Mini Probe helps you gather monitoring data from systems which do not run the supported Windows versions. Because there is demand from time to time by our customers for JMX monitoring and the proposed method via SNMP is not completely sufficient, we provide you a Mini Probe proof-of-concept for this purpose.
This Mini Probe proof-of-concept is written in Java. Then you have two options to run the JMX probe: Either you start it as standalone in its own virtual machine, or you add it to an application container. In standalone mode, the probe will run in its own threadpool so you do not need to have an application server installed. You can adjust these default sensors or add even new ones to the probe package. Up Down Hey there. Up Down Hi Sascha. Up Down Hallo.
I could start an easy setup successfuly. Up Down Yes, we need to improve the documentation to cover 1, 2, and 3. For your other questions:. Up Down Trying to this Mini Probe running. But without success.The problem is most likely that your default Windows temporary directory is on a FAT file system. For security reasons, local monitoring and management is only supported if your default Windows temporary directory is on a file system that supports setting permissions on files and directories for example, on an NTFS file system.
It is not supported on a FAT file system that provide insufficient access controls. A potential workaround for this issue: Set the TMP environment variable to refer to a directory on an NTFS file system, or any file system that supports setting permissions on files and directories before you run your application with local or remote management enabled.
Note that this file system should be local to the machine. Setting this option for target applications is application specific. To set this variable in a command prompt or in a batch script, simply enter the following:. Through this interface, you can choose to set the variable for all processes run by the current user or globally as a system variable for all processes run by the system.
Bug will be fixed in a future release. Please see the "How to secure a password file on Windows systems" document for details. It is most likely a configuration problem. First, make sure your application was started with remote management enabled. Second, check if SSL is enabled in the management properties to enable remote management and if it is configured properly. SSL is enabled by default when the remote management is enabled.
You can disable SSL by setting com. If the connection failure problem occurs only when your application runs on Linuxplease see FAQ 5. This is most likely a configuration problem on the Linux machine or the management properties specified to run the application.
Run "hostname -i" command. If it reports Packet filtering is built in the Linux kernel. You can use the following command to add a rule to allow an external client such as JConsole to connect:.
Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. But when I try to restart the application, sometime I got an error says the JMX port number is already in use. This is not acceptable. Yes, you should create JMX connector programmatically. As easier workaround, you can select another port for JMX in runtime if default port is busy by just killed process. OR just attempt opening your port again and again until it succeeds.
In Scala, sorry, but you should be able to adapt it easily enough. I had the same issue. It was the first instance of my application which I had stopped which was still subscribed to this port, so the new instance could not start. What worked in my case was unregistering the bean right before stopping the application so that the socket is free.
This could be one workaround: On the remote server you can have two ports: and forwarded to When restarting your application alternate a boolean each time to decide to connect to or Learn more.
Asked 5 years, 11 months ago. Active 4 years, 11 months ago. Viewed 1k times. Any idea? George George 3, 2 2 gold badges 18 18 silver badges 26 26 bronze badges. Have you looked to see what application is using that port?
I must be my application. So I want to make this port reusable.Search everywhere only in this topic. Advanced Search. Classic List Threaded. Edwin Quijada. Problem with monitoring with JMX. ClassLoaderLogManager" java. ClassNotFoundException: org. AsyncFileHandler" java. ClassNotFoundException: 1catalina. AsyncFileHandler java. Niranjan Babu Bommu. Re: Problem with monitoring with JMX. In reply to this post by Niranjan Babu Bommu. What are shared apps? Christopher Schultz In reply to this post by Edwin Quijada.
What version of Tomcat are you running? To both : Do not guess. It also recommends that you should not modify either catalina. The reason not to modify the above files, is that they will be overwritten if you update or re-install your Tomcat, and thus your changes would be lost in that case. An exception to the above, is if you run Tomcat as a Service under Windows. Then you should set the Java options using the "tomcatw.
In reply to this post by Christopher Schultz Tomcat 8. What is the sanitized? Usually, "cannot find class" means that some system property has been broken enough to cause the command-line to get all fouled up.
You should also not guess. In reply to this post by Niranjan Babu Bommu What are shared apps? In reply to this post by Edwin Quijada To both : Do not guess.You seem to have CSS turned off. Please don't fill out this field. Please provide the ad click URL, if possible:. Help Create Join Login. Operations Management.
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VuFind Brought to you by: asnagycrhallbergdemiankatzdesign4lib. Oh no! Some styles failed to load. Sign Up No, Thank you. Thanks for helping keep SourceForge clean. X You seem to have CSS turned off. Briefly describe the problem required :. Upload screenshot of ad required :. Hi everyone, I am experiencing an issue with our instance of VuFind version 3. This is the output of vufind. We tried to restart the service and to launch manually but nothing changes.
The important bit seems to be "Could not start JMX monitoring". Any clues?