simply about difficult
Suppose that you have a Kafka Topic with some data, and you connect to it with Kafka Consumer with a new group.id. But this consumer does not read messages from the beginning of the topic. Consumer Config has a specific property auto.offset.reset, which indicates which offset will be assigned to the consumer with the new […]
READ MORESuppose that you have this exception: Most often this happens due to syntax errors in the original JSON. Firstly, check that your source JSON is NOT empty string! Then check your syntax, for example, that you do not have extra space: Or extra commas:
READ MORESuppose you have a class with constants: And you made the static import of this constant in another class: Everything looks good, and IDEA does not show any mistakes (in fact, there are really no errors in code). But Maven suddenly failed building project with cannot find symbol error. This situation can arise because there […]
READ MOREIf you got MismatchedInputException: Then visit this link: https://mchesnavsky.tech/jackson-mismatched-input-exception/.
READ MORESuppose you are trying to do something like: But the output is something like: There are at least two reasons: Configuration file does not exist; Setters for MyConfiguration.class are named incorrectly or cannot be accessed.
READ MOREIf you need to get a list of keytab principals through Java code, you can use the sun.security.krb5.internal.ktab.KeyTab class:
READ MOREgRPC doesn’t support JKS out of the box, but there is a workaround. Below is an example of how to use gRPC and JKS. Server side Client side If you don’t need to use custom truststore, you need to do nothing. If you need to use custom truststore, use example below: You can use trustManagerFactory […]
READ MOREFull text of the error: If you encounter such an error, there are at least two reasons: Incompatible version of boring-ssl library. Private key problem. For example, we wrote our own KeyManager implementation and the getPrivateKey() method returns null, or there is no such private key at all.
READ MOREFull text of the error: If you encounter such an exception, it could mean that you are trying to access somewhere using https/ssl/tls, but the endpoint does not support it, and supports plain connection/http. Thanks ingenuity2k.
READ MOREYou may encounter an error when compiling your project that looks like this: It is not at all clear what class are meant. If you work with IntelliJ IDEA – this is the reason. Sometime it parses maven build/compile logs incorrectly, so the second part of the exception was lost. Compile manually through the terminal […]
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