NullPointerException when KOIOS http endpoint is not available

[DevStakePool]

What operating system are you using, and which version?

• Linux / Ubuntu

Steps to Reproduce

Using the latest version of the koios-java-client 1.15.1 I saw some NPE in my bot logs when the koios (mainnet) endpoint is not available

Here's the stack trace

ava.lang.NullPointerException: null
        at rest.koios.client.backend.api.address.impl.AddressServiceImpl.getAddressTransactions(AddressServiceImpl.java:75) ~[koios-java-client-1.15.1.jar!/:na]
        at com.devpool.thothBot.scheduler.TransactionCheckerTask.checkTransactionsForUsers(TransactionCheckerTask.java:169) ~[classes!/:1.0.0-rc1]
        at com.devpool.thothBot.scheduler.TransactionCheckerTask.run(TransactionCheckerTask.java:147) ~[classes!/:1.0.0-rc1]
        at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) ~[na:na]
        at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305) ~[na:na]
        at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305) ~[na:na]
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
        at java.base/java.lang.Thread.run(Thread.java:829) ~[na:na]

I also found the following while digging the logs

Requested endpoint with provided parameters was not found! Please verify syntax referring to examples from <a href="https://api.koios.rest">API Documentations</a> !!
</body></html>

 (404)

[edridudi]

Thanks for reporting.
@DevStakePool Is it possible to elaborate a little more?
what query did you use?
what network?

[DevStakePool]

Hi @edridudi, I realised it's an issue on my side. Basically my previous call to get the account addresses fails due to unavailability of Koios backend and I'm passing a null list to the rest.koios.client.backend.api.address.impl.AddressServiceImpl.getAddressTransactions() method. I will investigate

[edridudi]

Hi @DevStakePool ,
Any news about this issue?

[DevStakePool]

It was an issue on my side. I would suggest to close this issue