[jira] [Created] (HBASE-22453) A "NullPointerException" could be thrown; "tableDescriptor" is nullable

["lixiaobao (JIRA)" <ji...@apache.org>]

lixiaobao created HBASE-22453:
---------------------------------

             Summary: A "NullPointerException" could be thrown; "tableDescriptor" is nullable
                 Key: HBASE-22453
                 URL: https://issues.apache.org/jira/browse/HBASE-22453
             Project: HBase
          Issue Type: Bug
          Components: backup&restore
    Affects Versions: 2.1.4, 2.1.2, 2.0.0
            Reporter: lixiaobao
            Assignee: lixiaobao
             Fix For: 3.0.0


In hbase-backup model the class  "org.apache.hadoop.hbase.backup.util.RestoreTool"'s method incrementalRestoreTable(),A "NullPointerException" could be thrown; "tableDescriptor" is nullable here.
{code:java}
// adjust table schema
  for (int i = 0; i < tableNames.length; i++) {
    TableName tableName = tableNames[i];
    TableDescriptor tableDescriptor = getTableDescriptor(fileSys, tableName, incrBackupId);
    LOG.debug("Found descriptor " + tableDescriptor + " through " + incrBackupId);

    TableName newTableName = newTableNames[i];
    TableDescriptor newTableDescriptor = admin.getDescriptor(newTableName);
    List<ColumnFamilyDescriptor> families = Arrays.asList(tableDescriptor.getColumnFamilies());
    List<ColumnFamilyDescriptor> existingFamilies =
        Arrays.asList(newTableDescriptor.getColumnFamilies());
    TableDescriptorBuilder builder = TableDescriptorBuilder.newBuilder(newTableDescriptor);
    boolean schemaChangeNeeded = false;
    for (ColumnFamilyDescriptor family : families) {
      if (!existingFamilies.contains(family)) {
        builder.setColumnFamily(family);
        schemaChangeNeeded = true;
      }
    }
    for (ColumnFamilyDescriptor family : existingFamilies) {
      if (!families.contains(family)) {
        builder.removeColumnFamily(family.getName());
        schemaChangeNeeded = true;
      }
    }
    if (schemaChangeNeeded) {
      modifyTableSync(conn, builder.build());
      LOG.info("Changed " + newTableDescriptor.getTableName() + " to: " + newTableDescriptor);
    }
  }
  RestoreJob restoreService = BackupRestoreFactory.getRestoreJob(conf);

  restoreService.run(logDirs, tableNames, newTableNames, false);
}
//代码占位符
{code}



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