We've been running JDK 1.8.0_242 and Nifi 1.12.1 for almost a month now without incidents.   ... View more

openjdk version "1.8.0_265", yes.   I'll try to upgrade Java, thanks! ... View more

We can reliably reproduce the exact same problem on InvokeHTTP 1.11.4 processor when performing a GET on an internal API. We run Nifi in a VM in GCloud.   We tried various number of threads, run schedule, etc.   Once in a while, it gets stuck forever and we need to terminate the thread or stop/start Nifi.   Nifi dumps shows the wait on some http2 streaming method.   2020-06-18 14:20:49,214 INFO [main] org.apache.nifi.bootstrap.RunNiFi "Timer-Driven Process Thread-5" Id=57 WAITING on okhttp3.internal.http2.Http 2Stream@740df261   It really feels like the timeout properties are not taken into account.   The solution described by @keithg is a reliable workaround. Using Python in an ExecuteScript processor is never hanging/freezing.     ... View more