/**
* Flush and log stats on flush
*
* @param r
* @param server
* @throws IOException
*/
private void flush(final Region r, final HRegionServer server) throws IOException {
LOG.info(
"Flush "
+ r.toString()
+ " on "
+ server.getServerName()
+ ", "
+ r.flush(true)
+ ", size="
+ server.getRegionServerAccounting().getGlobalMemstoreSize());
}
/**
* Test the global mem store size in the region server is equal to sum of each region's mem store
* size
*
* @throws Exception
*/
@Test
public void testGlobalMemStore() throws Exception {
// Start the cluster
LOG.info("Starting cluster");
Configuration conf = HBaseConfiguration.create();
TEST_UTIL = new HBaseTestingUtility(conf);
TEST_UTIL.startMiniCluster(1, regionServerNum);
cluster = TEST_UTIL.getHBaseCluster();
LOG.info("Waiting for active/ready master");
cluster.waitForActiveAndReadyMaster();
// Create a table with regions
TableName table = TableName.valueOf("TestGlobalMemStoreSize");
byte[] family = Bytes.toBytes("family");
LOG.info("Creating table with " + regionNum + " regions");
Table ht = TEST_UTIL.createMultiRegionTable(table, family, regionNum);
int numRegions = -1;
try (RegionLocator r = TEST_UTIL.getConnection().getRegionLocator(table)) {
numRegions = r.getStartKeys().length;
}
assertEquals(regionNum, numRegions);
waitForAllRegionsAssigned();
for (HRegionServer server : getOnlineRegionServers()) {
long globalMemStoreSize = 0;
for (HRegionInfo regionInfo : ProtobufUtil.getOnlineRegions(server.getRSRpcServices())) {
globalMemStoreSize +=
server.getFromOnlineRegions(regionInfo.getEncodedName()).getMemstoreSize();
}
assertEquals(server.getRegionServerAccounting().getGlobalMemstoreSize(), globalMemStoreSize);
}
// check the global memstore size after flush
int i = 0;
for (HRegionServer server : getOnlineRegionServers()) {
LOG.info(
"Starting flushes on "
+ server.getServerName()
+ ", size="
+ server.getRegionServerAccounting().getGlobalMemstoreSize());
for (HRegionInfo regionInfo : ProtobufUtil.getOnlineRegions(server.getRSRpcServices())) {
Region r = server.getFromOnlineRegions(regionInfo.getEncodedName());
flush(r, server);
}
LOG.info("Post flush on " + server.getServerName());
long now = System.currentTimeMillis();
long timeout = now + 1000;
while (server.getRegionServerAccounting().getGlobalMemstoreSize() != 0
&& timeout < System.currentTimeMillis()) {
Threads.sleep(10);
}
long size = server.getRegionServerAccounting().getGlobalMemstoreSize();
if (size > 0) {
// If size > 0, see if its because the meta region got edits while
// our test was running....
for (HRegionInfo regionInfo : ProtobufUtil.getOnlineRegions(server.getRSRpcServices())) {
Region r = server.getFromOnlineRegions(regionInfo.getEncodedName());
long l = r.getMemstoreSize();
if (l > 0) {
// Only meta could have edits at this stage. Give it another flush
// clear them.
assertTrue(regionInfo.isMetaRegion());
LOG.info(r.toString() + " " + l + ", reflushing");
r.flush(true);
}
}
}
size = server.getRegionServerAccounting().getGlobalMemstoreSize();
assertEquals("Server=" + server.getServerName() + ", i=" + i++, 0, size);
}
ht.close();
TEST_UTIL.shutdownMiniCluster();
}