Hi Vibhath, NiFi supports Java 8 and 11, and automated builds regularly run on AdoptOpenJDK and Azul Zulu JDK. The particular error you mentioned was recently resolved in a pull request for NIFI-6714. The fix will be included in the next release of NiFi.
https://issues.apache.org/jira/browse/NIFI-6714 The message is a warning on Java 11, but does not prevent NiFi from starting. Newer versions of Java block such illegal reflective access operations, so for now, Java 8 or 11 should work. Regards, David Handermann On Wed, May 5, 2021 at 10:22 AM Cristiano Silva <[email protected]> wrote: > I use openjdk 8. > > Check the version of java (openjdk) you are using. > > Try using it (openjdk 8) and see if it works. > > Atenciosamente, > Cristiano Luís Turbino de França e Silva > ============================== > GNU / Linux > , , / .-. > / \ / (e e) > ((__-^^-,-^^-__)) / _.`V'._ > `-_---' `---_-' / //~~W~~\\ > <__|o ` 'o|__> / //, ,\\ > \ ` / / // | | \\ > ): :( / \) | | (/ > :o_o: / \ / > "-" / `w - w' > > > On Wed, May 5, 2021 at 10:13 AM Vibhath Ileperuma < > [email protected]> wrote: > >> Hi All, >> >> I tried to start NIFI binary downloaded from apache NIFI website, in a >> linux environment in which java openjdk is installed. When I start the >> NIFI, the following warnings are printed. These warnings are written in >> nifi-boostrap.log file too. >> >> WARNING: An illegal reflective access operation has occurred >> >> WARNING: Illegal reflective access by >> org.apache.nifi.bootstrap.util.OSUtils >> (file:/x01/vibhath/nifi-1.13.2/lib/bootstrap/nifi-bootstrap-1.13.2.jar) to >> method java.lang.ProcessImpl.pid() >> >> WARNING: Please consider reporting this to the maintainers of >> org.apache.nifi.bootstrap.util.OSUtils >> >> WARNING: Use --illegal-access=warn to enable warnings of further illegal >> reflective access operations >> >> WARNING: All illegal access operations will be denied in a future release >> >> >> When oracle jdk is used, no warnings are printed. Is this warings printed >> because of openJDK? Could you please let me know the impact of these >> warnings. >> >> Is it possible to find an openJDK supported NIFI binary from the >> internet? Or else, should we build NIFI from source? >> >> >> I would be grateful if you could clarify my doubts. >> >> >> >> *Best Regards,* >> >> *Vibhath* >> >> >>
