[PHOENIX-6755] SystemCatalogRegionObserver extends BaseRegionObserver which doesn't exist in hbase-2.4 branch.

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 5.1.2
• Fix Version/s: 5.2.0, 5.1.3
• Component/s: core
• Assignee: Rushabh Shah
• Reporter: Rushabh Shah
• Created: 26/Jul/22 05:10
• Updated: 26/Jul/22 23:14
• Resolved: 26/Jul/22 23:14

Description

One of our downstream services dependent on phoenix failed to startup with this phoenix-5.1 version and hbase-2.4.10 branch. Stack trace is pasted below:

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/hbase/coprocessor/BaseRegionObserver
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:757)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:473)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:74)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:369)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:419)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:365)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:352)
        at org.apache.phoenix.query.ConnectionQueryServicesImpl.addCoprocessors(ConnectionQueryServicesImpl.java:1177)
        at org.apache.phoenix.query.ConnectionQueryServicesImpl.generateTableDescriptor(ConnectionQueryServicesImpl.java:968)
        at org.apache.phoenix.query.ConnectionQueryServicesImpl.ensureTableCreated(ConnectionQueryServicesImpl.java:1419)
        at org.apache.phoenix.query.ConnectionQueryServicesImpl.createTable(ConnectionQueryServicesImpl.java:1936)
        at org.apache.phoenix.schema.MetaDataClient.createTableInternal(MetaDataClient.java:3084)
        at org.apache.phoenix.schema.MetaDataClient.createTable(MetaDataClient.java:1111)
        at org.apache.phoenix.compile.CreateTableCompiler$CreateTableMutationPlan.execute(CreateTableCompiler.java:420)
        at org.apache.phoenix.jdbc.PhoenixStatement$2.call(PhoenixStatement.java:415)
        at org.apache.phoenix.jdbc.PhoenixStatement$2.call(PhoenixStatement.java:397)
        at org.apache.phoenix.call.CallRunner.run(CallRunner.java:53)
        at org.apache.phoenix.jdbc.PhoenixStatement.executeMutation(PhoenixStatement.java:396)
        at org.apache.phoenix.jdbc.PhoenixStatement.executeMutation(PhoenixStatement.java:384)
        at org.apache.phoenix.jdbc.PhoenixStatement.executeUpdate(PhoenixStatement.java:1906)
        at org.apache.phoenix.query.ConnectionQueryServicesImpl$12.call(ConnectionQueryServicesImpl.java:3290)
        at org.apache.phoenix.query.ConnectionQueryServicesImpl$12.call(ConnectionQueryServicesImpl.java:3253)
        at org.apache.phoenix.util.PhoenixContextExecutor.call(PhoenixContextExecutor.java:76)
        at org.apache.phoenix.query.ConnectionQueryServicesImpl.init(ConnectionQueryServicesImpl.java:3253)
        at org.apache.phoenix.jdbc.PhoenixDriver.getConnectionQueryServices(PhoenixDriver.java:255)

Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.hbase.coprocessor.BaseRegionObserver
        at java.net.URLClassLoader.findClass(URLClassLoader.java:387)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:419)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:365)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:352)

It is throwing NoClassDefFoundError java.lang.NoClassDefFoundError: org/apache/hadoop/hbase/coprocessor/BaseRegionObserver

ConnectionQueryServicesImpl.java#L1177 is as below:

if (Arrays.equals(tableName, SchemaUtil.getPhysicalName(SYSTEM_CATALOG_NAME_BYTES, props).getName())) {
if (!newDesc.hasCoprocessor(SystemCatalogRegionObserver.class.getName()))

{ builder.addCoprocessor( SystemCatalogRegionObserver.class.getName(), null, priority, null); }

It is trying to load SystemCatalogRegionObserver class.

Within integration tests, it is loading org/apache/hadoop/hbase/coprocessor/BaseRegionObserver via omid dependency, omid-hbase-shims-hbase2.x

Issue Links

• links to: GitHub Pull Request #1472