Even more exactly, from the root cause stack trace it appears that the
replacement class
/** Hadoop class name: ShutdownHookManager replacement. */
public static final String CLS_SHUTDOWN_HOOK_MANAGER_REPLACE =
"org.apache.ignite.internal.processors.hadoop.impl.v2.HadoopShutdownHookManager";
had bytecode version > 1.7.
After regular Ignite build the following class file produced:
-----------------
$ javap -v
./org/apache/ignite/internal/processors/hadoop/impl/v2/HadoopShutdownHookManager.class
Classfile
/home/ivan/_git/apache-ignite/modules/hadoop/org/apache/ignite/internal/processors/hadoop/impl/v2/HadoopShutdownHookManager.class
Last modified Apr 17, 2017; size 1802 bytes
MD5 checksum 0deafdb744c37001448585ff0f7e6c12
Compiled from "HadoopShutdownHookManager.java"
public class
org.apache.ignite.internal.processors.hadoop.impl.v2.HadoopShutdownHookManager
SourceFile: "HadoopShutdownHookManager.java"
* minor version: 0
major version: 51
* flags: ACC_PUBLIC, ACC_SUPER
----------------
Major version 51 corresponds to Java class file version 1.7.
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