What version of Java are you using? IIRC NiFi 1.23 requires a Java version between 8 and 17.
Regards, Matt On Tue, Jun 24, 2025 at 8:22 AM <[email protected]> wrote: > > Hello, > > I don't know if it is mysql driver issue or the nifi nar issue. > > Could you please help me to understand theses errors ? > > 2025-06-24 13:33:35,729 ERROR [NiFi logging handler] > org.apache.nifi.StdErr WARNING: An illegal reflective access operation has > occurred > 2025-06-24 13:33:35,730 ERROR [NiFi logging handler] > org.apache.nifi.StdErr WARNING: Illegal reflective access by > org.springframework.cglib.core.ReflectUtils > (file:/appl/nifi/nifi-current/work/nar/framework/nifi-framework-nar-1.23.2.nar-unpacked/NAR-INF/bundled-dependencies/spring-core-5.3.29.jar) > to method > java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) > 2025-06-24 13:33:35,730 ERROR [NiFi logging handler] > org.apache.nifi.StdErr WARNING: Please consider reporting this to the > maintainers of org.springframework.cglib.core.ReflectUtils > 2025-06-24 13:33:35,730 ERROR [NiFi logging handler] > org.apache.nifi.StdErr WARNING: Use --illegal-access=warn to enable > warnings of further illegal reflective access operations > 2025-06-24 13:33:35,730 ERROR [NiFi logging handler] > org.apache.nifi.StdErr WARNING: All illegal access operations will be > denied in a future release > 2025-06-24 13:49:34,404 ERROR [NiFi logging handler] > org.apache.nifi.StdErr Log configuration loaded from default internal file. > 2025-06-24 13:49:52,239 ERROR [NiFi logging handler] > org.apache.nifi.StdErr Loading class `com.mysql.jdbc.Driver'. This is > deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver > is automatically registered via the SPI and manual loading of the driver > class is generally unnecessary. > 2025-06-24 13:49:52,666 ERROR [NiFi logging handler] > org.apache.nifi.StdErr Loading class `com.mysql.jdbc.Driver'. This is > deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver > is automatically registered via the SPI and manual loading of the driver > class is generally unnecessary. > 2025-06-24 13:49:53,333 ERROR [NiFi logging handler] > org.apache.nifi.StdErr Loading class `com.mysql.jdbc.Driver'. This is > deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver > is automatically registered via the SPI and manual loading of the driver > class is generally unnecessary. > 2025-06-24 13:49:53,929 ERROR [NiFi logging handler] > org.apache.nifi.StdErr Loading class `com.mysql.jdbc.Driver'. This is > deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver > is automatically registered via the SPI and manual loading of the driver > class is generally unnecessary. > 2025-06-24 13:58:36,457 ERROR [NiFi logging handler] > org.apache.nifi.StdErr WARNING: An illegal reflective access operation has > occurred > 2025-06-24 13:58:36,458 ERROR [NiFi logging handler] > org.apache.nifi.StdErr WARNING: Illegal reflective access by > org.springframework.cglib.core.ReflectUtils > (file:/nifi-current/work/nar/framework/nifi-framework-nar-1.23.2.nar-unpacked/NAR-INF/bundled-dependencies/spring-core-5.3.29.jar) > to method > java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) > 2025-06-24 13:58:36,458 ERROR [NiFi logging handler] > org.apache.nifi.StdErr WARNING: Please consider reporting this to the > maintainers of org.springframework.cglib.core.ReflectUtils > 2025-06-24 13:58:36,458 ERROR [NiFi logging handler] > org.apache.nifi.StdErr WARNING: Use --illegal-access=warn to enable > warnings of further illegal reflective access operations > 2025-06-24 13:58:36,458 ERROR [NiFi logging handler] > org.apache.nifi.StdErr WARNING: All illegal access operations will be > denied in a future release > > Thanks > > Minh >
