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HBASE-2772 Scan doesn't recover from region server failure 

HBASE-2775  Update of hadoop jar in HBASE-2771 broke TestMultiClusters


git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@957333 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Jean-Daniel Cryans 2010-06-23 20:33:48 +00:00
parent c4654b285a
commit 049120cdde
4 changed files with 68 additions and 35 deletions
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2
pom.xml
View File

@ -443,7 +443,7 @@
<compileSource>1.6</compileSource>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<hbase.version>0.21.0-SNAPSHOT</hbase.version>
<hadoop.version>0.20.3-append-r956776</hadoop.version>
<hadoop.version>0.20.3-append-r956776+1240</hadoop.version>
<commons-cli.version>1.2</commons-cli.version>
<commons-logging.version>1.1.1</commons-logging.version>

9
src/main/java/org/apache/hadoop/hbase/client/HTable.java
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@ -942,9 +942,12 @@ public class HTable implements HTableInterface {
values = getConnection().getRegionServerWithRetries(callable);
}
} catch (DoNotRetryIOException e) {
if (e instanceof UnknownScannerException) {
long timeout = lastNext + scannerTimeout;
if (e instanceof UnknownScannerException &&
timeout < System.currentTimeMillis()) {
// If we are over the timeout, throw this exception to the client
// Else, it's because the region moved and we used the old id
// against the new region server; reset the scanner.
if (timeout < System.currentTimeMillis()) {
long elapsed = System.currentTimeMillis() - lastNext;
ScannerTimeoutException ex = new ScannerTimeoutException(
elapsed + "ms passed since the last invocation, " +
@ -952,10 +955,12 @@ public class HTable implements HTableInterface {
ex.initCause(e);
throw ex;
}
} else {
Throwable cause = e.getCause();
if (cause == null || !(cause instanceof NotServingRegionException)) {
throw e;
}
}
// Else, its signal from depths of ScannerCallable that we got an
// NSRE on a next and that we need to reset the scanner.
if (this.lastResult != null) {

14
src/test/java/org/apache/hadoop/hbase/MiniHBaseCluster.java
View File

@ -386,15 +386,25 @@ public class MiniHBaseCluster {
/**
* @return Index into List of {@link MiniHBaseCluster#getRegionServerThreads()}
* of HRS carrying .META. Returns -1 if none found.
* of HRS carrying regionName. Returns -1 if none found.
*/
public int getServerWithMeta() {
return getServerWith(HRegionInfo.FIRST_META_REGIONINFO.getRegionName());
}
/**
* Get the location of the specified region
* @param regionName Name of the region in bytes
* @return Index into List of {@link MiniHBaseCluster#getRegionServerThreads()}
* of HRS carrying .META.. Returns -1 if none found.
*/
public int getServerWith(byte[] regionName) {
int index = -1;
int count = 0;
for (JVMClusterUtil.RegionServerThread rst: getRegionServerThreads()) {
HRegionServer hrs = rst.getRegionServer();
HRegion metaRegion =
hrs.getOnlineRegion(HRegionInfo.FIRST_META_REGIONINFO.getRegionName());
hrs.getOnlineRegion(regionName);
if (metaRegion != null) {
index = count;
break;

56
src/test/java/org/apache/hadoop/hbase/client/TestScannerTimeout.java
View File

@ -23,7 +23,11 @@ public class TestScannerTimeout {
TEST_UTIL = new HBaseTestingUtility();
final Log LOG = LogFactory.getLog(getClass());
private final byte[] someBytes = Bytes.toBytes("f");
private final static byte[] SOME_BYTES = Bytes.toBytes("f");
private final static byte[] TABLE_NAME = Bytes.toBytes("t");
private final static int NB_ROWS = 10;
private final static int SCANNER_TIMEOUT = 6000;
private static HTable table;
/**
* @throws java.lang.Exception
@ -31,8 +35,14 @@ public class TestScannerTimeout {
@BeforeClass
public static void setUpBeforeClass() throws Exception {
Configuration c = TEST_UTIL.getConfiguration();
c.setInt("hbase.regionserver.lease.period", 1000);
TEST_UTIL.startMiniCluster(1);
c.setInt("hbase.regionserver.lease.period", SCANNER_TIMEOUT);
TEST_UTIL.startMiniCluster(2);
table = TEST_UTIL.createTable(Bytes.toBytes("t"), SOME_BYTES);
for (int i = 0; i < NB_ROWS; i++) {
Put put = new Put(Bytes.toBytes(i));
put.add(SOME_BYTES, SOME_BYTES, SOME_BYTES);
table.put(put);
}
}
/**
@ -48,13 +58,7 @@ public class TestScannerTimeout {
*/
@Before
public void setUp() throws Exception {
}
/**
* @throws java.lang.Exception
*/
@After
public void tearDown() throws Exception {
TEST_UTIL.ensureSomeRegionServersAvailable(2);
}
/**
@ -63,22 +67,16 @@ public class TestScannerTimeout {
*/
@Test
public void test2481() throws Exception {
int initialCount = 10;
HTable t = TEST_UTIL.createTable(Bytes.toBytes("t"), someBytes);
for (int i = 0; i < initialCount; i++) {
Put put = new Put(Bytes.toBytes(i));
put.add(someBytes, someBytes, someBytes);
t.put(put);
}
Scan scan = new Scan();
ResultScanner r = t.getScanner(scan);
ResultScanner r = table.getScanner(scan);
int count = 0;
try {
Result res = r.next();
while (res != null) {
count++;
if (count == 5) {
Thread.sleep(1500);
// Sleep just a bit more to be sure
Thread.sleep(SCANNER_TIMEOUT+100);
}
res = r.next();
}
@ -88,4 +86,24 @@ public class TestScannerTimeout {
}
fail("We should be timing out");
}
/**
* Test that scanner can continue even if the region server it was reading
* from failed. Before 2772, it reused the same scanner id.
* @throws Exception
*/
@Test
public void test2772() throws Exception {
int rs = TEST_UTIL.getHBaseCluster().getServerWith(
TEST_UTIL.getHBaseCluster().getRegions(
TABLE_NAME).get(0).getRegionName());
Scan scan = new Scan();
ResultScanner r = table.getScanner(scan);
// This takes exactly 5 seconds
TEST_UTIL.getHBaseCluster().getRegionServer(rs).abort("die!");
Result[] results = r.next(NB_ROWS);
assertEquals(NB_ROWS, results.length);
r.close();
}
}