simply about difficult
Let’s say you need to get the name of hdfs cluster in an application. To do this, you need to get the org.apache.hadoop.conf.Configuration object: In the place we need, we get the fs.defaultFS property value:
READ MORELet’s say we need to terminate Spring Boot Yarn application due to checked exception. To do this, in the AppMaster class (it must be specified in the appmaster-class property in application.yml) we need to call the method in the place we need: If you need to stop the application from outside the AppMaster class, you can […]
READ MORELet’s say you need to run the distcp command: But as a result, you get an error like this: One of the non-obvious reasons for such an error may be that node1:8020 is not an active node. Recheck the hostname and run the command again.
READ MOREImagine, that you need to use the HBase client 1.x and gRPC in the same Java application. The code for connecting dependencies to Maven will look something like this: If you run the application and execute the request through the HBase client, there will be an exception: The problem is that hbase-client 1.x uses an earlier […]
READ MORESuppose, that we need to read the file from the Spring Boot Yarn application. We seem to have done everything right: placed the file next to the Yarn-client, Yarn-container and Yarn-appmaster jars; have used the File class, Files class, FileInputStream class and others. But for some reason we see exceptions like below: The problem is […]
READ MOREFull text of the exception in Apache Ignite: The code that uses the reentrant lock looks something like this: Check that when creating a lock, the last argument = true is passed to the reentrantLock method: If the error is still repeated, then this is a bug: https://issues.apache.org/jira/browse/IGNITE-3386. It appears when one of the server […]
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