/**
* This test assumes a master crash/failure during the meta migration process and attempts to
* continue the meta migration process when a new master takes over. When a master dies during the
* meta migration we will have some rows of META.CatalogFamily updated with PB serialization and
* some still hanging with writable serialization. When the backup master/ or fresh start of
* master attempts the migration it will encounter some rows of META already updated with new HRI
* and some still legacy. This test will simulate this scenario and validates that the migration
* process can safely skip the updated rows and migrate any pending rows at startup.
*
* @throws Exception
*/
@Test
public void testMasterCrashDuringMetaMigration() throws Exception {
final byte[] FAMILY = Bytes.toBytes("family");
HTableDescriptor htd = new HTableDescriptor("testMasterCrashDuringMetaMigration");
HColumnDescriptor hcd = new HColumnDescriptor(FAMILY);
htd.addFamily(hcd);
Configuration conf = TEST_UTIL.getConfiguration();
// Create 10 New regions.
createMultiRegionsWithPBSerialization(conf, htd.getName(), 10);
// Create 10 Legacy regions.
createMultiRegionsWithWritableSerialization(conf, htd.getName(), 10);
CatalogTracker ct = TEST_UTIL.getMiniHBaseCluster().getMaster().getCatalogTracker();
// Erase the current version of root meta for this test.
undoVersionInRoot(ct);
MetaReader.fullScanMetaAndPrint(ct);
LOG.info("Meta Print completed.testUpdatesOnMetaWithLegacyHRI");
long numMigratedRows =
MetaMigrationConvertingToPB.updateMetaIfNecessary(TEST_UTIL.getHBaseCluster().getMaster());
assertEquals(numMigratedRows, 10);
// Assert that the flag in ROOT is updated to reflect the correct status
boolean metaUpdated =
MetaMigrationConvertingToPB.isMetaTableUpdated(
TEST_UTIL.getMiniHBaseCluster().getMaster().getCatalogTracker());
assertEquals(true, metaUpdated);
verifyMetaRowsAreUpdated(ct);
LOG.info("END testMasterCrashDuringMetaMigration");
}
