simply about difficult
There is a lot of pre-configured metrics in Ignite that disabled for default. If you want to see them, you may pass instance of LogExporterSpi to IgniteConfiguration like that: You can work with Ignite metrics by some number of ways, not only through the logging system. For example: JMX SQL Views OpenCensus Please, refer to […]
READ MORELet’s assume, that you already have configured SLF4J in your project. It remains to do two things. Add dependency: Configure Ignite:
READ MOREIf you want to limit outbound message queue size, you just need to create instance of TcpCommunicationSpi, and pass it to IgniteConfiguration:
READ MOREThere is three synchronization modes in Apache Ignite: FULL_ASYNC FULL_SYNC PRIMARY_SYNC You can switch them by this way:
READ MOREIf you try to send the json as a parameter in url via Spring’s RestTemplate, you will encounter the following error: In order to solve this problem, you need to: Encode the URL yourself Disable url encoding at the RestTemplate level. Let’s do that: Many thanks to Chris Liu for showing how to disable url […]
READ MOREYou may encounter a problem while building project: There may be at least two problems: Outdated version of gradle Too new version of JDK. Try upgrading Gradle / downgrading the JDK version to 1.8.
READ MOREIn this article, we are going to figure out, how to delete PushGateway metrics/groups. Let’s also answer the question – why “PushGateway metrics delete not working” or “PushGateway groups delete not working”. First of all, you must specify all the keys of the group that you want to delete.You need to delete groups with such […]
READ MORELet’s imagine that you need to download a certificate from a website / service / endpoint and put it in the trusted certificates store (JKS or cacerts). To do this, you need to fill in the parameters SERVER_URL, ALIAS_NAME, CERT_NAME and run the script: As a result, an trusted jks storage will be created with […]
READ MOREFull error text: This error can be encountered if there are signed libraries among the dependencies of your project. To solve the problem, you need to exclude files with the extensions .SF, .DSA, .RSA from the build. Of course, we will assume that you are building uber jar (fat jar). For Maven: For Gradle: Complete […]
READ MOREIn this article we will find the answer for questions: How to change the column in Spark? How to modify column in Spark? In other words: how to create a user defined function (UDF) and apply it. For example, let’s have a look to UDF, that takes a String and returns a String. For Spark […]
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