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ASF subversion and git services commented on NIFI-7923: ------------------------------------------------------- Commit e7f244f267172e0307f21e60504982717d0a431a in nifi's branch refs/heads/main from Bryan Bende [ https://gitbox.apache.org/repos/asf?p=nifi.git;h=e7f244f ] NIFI-7923 Catch Throwable instead of Exception in NarAutoLoaderTask so that thread won't die (#4623) > Nar Auto-Loader cannot recover from Throwable/Error > --------------------------------------------------- > > Key: NIFI-7923 > URL: https://issues.apache.org/jira/browse/NIFI-7923 > Project: Apache NiFi > Issue Type: Bug > Components: Extensions > Affects Versions: 1.12.0 > Reporter: Nick Lawrence > Assignee: Bryan Bende > Priority: Minor > Time Spent: 20m > Remaining Estimate: 0h > > When a nar is built against an up-level JVM, a java Error is thrown while > loading the nar extension. The Throwable is not handled as the code only > handles sub classes of Exception. As a result the thread dies, and when a > corrected nar is later installed, the nar cannot be loaded. Restart of nifi > causes the updated nar to be loaded. > 2020-10-14 13:31:55,340 INFO [NAR Auto-Loader] -> > org.apache.nifi.nar.NarClassLoaders -> Loaded NAR file: > /opt/nifi/./work/nar/extensions/nifi-hri-nar-1.0-SNAPSHOT.nar-unpacked as > class loader > org.apache.nifi.nar.NarClassLoader[./work/nar/extensions/nifi-hri-nar-1.0-SNAPSHOT.nar-unpacked] > 2020-10-14 13:31:55,342 INFO [NAR Auto-Loader] -> > org.apache.nifi.nar.StandardNarLoader -> Successfully created class loaders > for 1 NARs, 0 were skipped > 2020-10-14 13:31:55,395 ERROR [NAR Auto-Loader] -> org.apache.nifi.NiFi -> An > Unknown Error Occurred in Thread Thread[NAR Auto-Loader,5,main]: > java.lang.UnsupportedClassVersionError: > com/ibm/watson/health/wffh/nifi/processors/hri/GetHriIngestRecords has been > compiled by a more recent version of the Java Runtime (class file version > 55.0), this version of the Java Runtime only recognizes class file versions > up to 52.0 > 2020-10-14 13:31:55,396 ERROR [NAR Auto-Loader] -> org.apache.nifi.NiFi -> > java.lang.UnsupportedClassVersionError: > com/ibm/watson/health/wffh/nifi/processors/hri/GetHriIngestRecords has been > compiled by a more recent version of the Java Runtime (class file version > 55.0), this version of the Java Runtime only recognizes class file versions > up to 52.0 > at java.lang.ClassLoader.defineClass1(Native Method) > at java.lang.ClassLoader.defineClass(ClassLoader.java:756) > at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) > at java.net.URLClassLoader.defineClass(URLClassLoader.java:468) > at java.net.URLClassLoader.access$100(URLClassLoader.java:74) > at java.net.URLClassLoader$1.run(URLClassLoader.java:369) > at java.net.URLClassLoader$1.run(URLClassLoader.java:363) > at java.security.AccessController.doPrivileged(Native Method) > at java.net.URLClassLoader.findClass(URLClassLoader.java:362) > at java.lang.ClassLoader.loadClass(ClassLoader.java:418) > at java.lang.ClassLoader.loadClass(ClassLoader.java:351) > at java.lang.Class.forName0(Native Method) > at java.lang.Class.forName(Class.java:348) > at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:370) > at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:404) > at java.util.ServiceLoader$1.next(ServiceLoader.java:480) > at > org.apache.nifi.nar.StandardExtensionDiscoveringManager.loadExtensions(StandardExtensionDiscoveringManager.java:156) > at > org.apache.nifi.nar.StandardExtensionDiscoveringManager.discoverExtensions(StandardExtensionDiscoveringManager.java:131) > at org.apache.nifi.nar.StandardNarLoader.load(StandardNarLoader.java:110) > at org.apache.nifi.nar.NarAutoLoaderTask.run(NarAutoLoaderTask.java:128) > at java.lang.Thread.run(Thread.java:748) > I looked at the source enough to believe that the Error is not handled > anywhere between StandardExtensionDiscovingManager.loadExtensions and > NarAutoLoaderTask.run. > I see no messages in the log that suggest that the updated nar is processed > after it is placed in the extensions directory. -- This message was sent by Atlassian Jira (v8.3.4#803005)