I am usig tess4j (net.sourceforge.tess4j:tess4j:4.4.0) and try OCR on pdf files. So as I understood I have to transform the pdf first to tiff or png (any of those suggested?) what I did like this: and get following warning: Question Does it has any influence on my scan results? (if not, ok – I can switc…
Understanding “APPARENT DEADLOCK!!! Complete Status” details
I have posted a small part of a log below from which I would really appreciate if someone can decode the following: List item Managed Threads Active Threads Active Tasks Pending Tasks Pool thread stack traces I have the following C3PO configuration: This is the Log: Some information on the apparent deadlock w…
Error in OBIEE 12c invoke java method via agent to send report to another server
I want to send a report via agent to a file system but I am getting the ‘error looking up EJBs’ as shown in the screenshot: Answer Action Framework expects EJBs to be deployed to the default location of /ejb. The mappedName annotation of the Session bean must preceded by a ejb/ A simple google sea…
Java FizzBuzz 1 Line
How can one complete the FizzBuzz exercise in Codingbat with just a return statement? The code that I last used to solve the problem was: My goal is to have code that looks something like this: Problem This is slightly more difficult version of the famous FizzBuzz problem which is sometimes given as a first p…
Sign in with Apple Java User Verification
I’ve implemented the app side of the new apple feature “Sign in with Apple” but i’m unable to verificate with authorizationCode in my backend. My backend is written in java and i’m unable to generate JWT and communicate with Apple servers. Answer First go developer.apple.com ->…
Pmd rule: Too many static imports may lead to messy code in unitTest is not violated
I have a doubt, I have a class in which I’m using different static import for import constants, my issue is that I’m getting the error message: Too many static imports may lead to messy code. But in the unit test it looks like it is not a bad practice. For example in a unit test class, I’m u…
Pom.xml and Properties for org.springframework.boot 2.1.8.RELEASE Redshift Cluster V1.0.10393
The first error I’m getting Invalid operation: SQL command “drop sequence if exists hibernate_sequence” not supported Further down in the exceptions I see the following. I assume I have to change the way indexes are incremented in hibernate_sequence. While building a java Spring Boot applica…
When publisher confirms are enabled, queue length limit is set and overflow is set to reject-publish,why cause in confirm callback I received is null?
I am learning Queue Length Limit(https://www.rabbitmq.com/maxlength.html), as it says, queue is set to ‘x-max-length:10’,and ‘x-overflow:reject-publish’, and also, I enable publisher confirms. So, when the number of messages in the queue reaches 10, the publisher will be informed of th…
Multiple filters applied to a single list in Java 8+
How can be achieved to pass a “list of filters” to a stream in Java 8, instead of applying them individually as illustrated in the following example? https://howtodoinjava.com/java8/stream-multiple-filters-example/ The purpose would be to dynamically create a list of filters, one way would be to i…
Spark – Transforming Complex Data Types
Goal The goal I want to achieve is to read a CSV file (OK) encode it to Dataset<Person>, where Person object has a nested object Address[]. (Throws an exception) The Person CSV file In a file called person.csv, there is the following data describing some persons: The first line is the schema and address…