[HBASE-5710] NPE in MiniCluster during metadata scan for a pre-split table with multiple column families

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Not A Problem
• Affects Version/s: 0.94.0
• Component/s: test, util

Environment

MiniCluster

• Assignee: Unassigned
• Reporter: James Taylor
• Created: 04/Apr/12 01:04
• Updated: 13/Jun/22 16:04
• Resolved: 11/Apr/15 01:25

Description

In the MiniCluster test environment, an NPE occurs while scanning regions
of a pre-split table with multiple column families. Without this working
in the test environment, you cannot write unit tests for these types of
scenarios.

Add the following to TestMetaScanner to repro:

@Test
public void testMultiFamilyMultiRegionMetaScanner() throws Exception {
LOG.info("Starting testMetaScanner");
final byte[] TABLENAME = Bytes.toBytes("testMetaScanner");
final byte[] FAMILY1 = Bytes.toBytes("family1");
final byte[] FAMILY2 = Bytes.toBytes("family2");
TEST_UTIL.createTable(TABLENAME, new byte[][]

{FAMILY1,FAMILY2}

);
Configuration conf = TEST_UTIL.getConfiguration();
HTable table = new HTable(conf, TABLENAME);
TEST_UTIL.createMultiRegions(conf, table, FAMILY1,
new byte[][]

{ HConstants.EMPTY_START_ROW, Bytes.toBytes("region_a"), Bytes.toBytes("region_b")}

);
TEST_UTIL.createMultiRegions(conf, table, FAMILY2,
new byte[][]

{ HConstants.EMPTY_START_ROW, Bytes.toBytes("region_a"), Bytes.toBytes("region_b")}

);
// Make sure all the regions are deployed
TEST_UTIL.countRows(table);

// This fails with an NPE currently
MetaScanner.allTableRegions(conf, TABLENAME, false).keySet();
table.close();
}