/**
* Tests that we can actually recover from a corruption on the primary given that we have replica
* shards around.
*/
public void testCorruptFileAndRecover()
throws ExecutionException, InterruptedException, IOException {
int numDocs = scaledRandomIntBetween(100, 1000);
// have enough space for 3 copies
internalCluster().ensureAtLeastNumDataNodes(3);
if (cluster().numDataNodes() == 3) {
logger.info("--> cluster has [3] data nodes, corrupted primary will be overwritten");
}
assertThat(cluster().numDataNodes(), greaterThanOrEqualTo(3));
assertAcked(
prepareCreate("test")
.setSettings(
Settings.builder()
.put(IndexMetaData.SETTING_NUMBER_OF_SHARDS, "1")
.put(IndexMetaData.SETTING_NUMBER_OF_REPLICAS, "1")
.put(MergePolicyConfig.INDEX_MERGE_ENABLED, false)
.put(
MockFSIndexStore.INDEX_CHECK_INDEX_ON_CLOSE_SETTING.getKey(),
false) // no checkindex - we corrupt shards on purpose
.put(
IndexSettings.INDEX_TRANSLOG_FLUSH_THRESHOLD_SIZE_SETTING.getKey(),
new ByteSizeValue(
1,
ByteSizeUnit
.PB)) // no translog based flush - it might change the .liv /
// segments.N files
));
ensureGreen();
disableAllocation("test");
IndexRequestBuilder[] builders = new IndexRequestBuilder[numDocs];
for (int i = 0; i < builders.length; i++) {
builders[i] = client().prepareIndex("test", "type").setSource("field", "value");
}
indexRandom(true, builders);
ensureGreen();
assertAllSuccessful(
client()
.admin()
.indices()
.prepareFlush()
.setForce(true)
.setWaitIfOngoing(true)
.execute()
.actionGet());
// we have to flush at least once here since we don't corrupt the translog
SearchResponse countResponse = client().prepareSearch().setSize(0).get();
assertHitCount(countResponse, numDocs);
final int numShards = numShards("test");
ShardRouting corruptedShardRouting = corruptRandomPrimaryFile();
logger.info("--> {} corrupted", corruptedShardRouting);
enableAllocation("test");
/*
* we corrupted the primary shard - now lets make sure we never recover from it successfully
*/
Settings build = Settings.builder().put(IndexMetaData.SETTING_NUMBER_OF_REPLICAS, "2").build();
client().admin().indices().prepareUpdateSettings("test").setSettings(build).get();
ClusterHealthResponse health =
client()
.admin()
.cluster()
.health(
Requests.clusterHealthRequest("test")
.waitForGreenStatus()
.timeout(
"5m") // sometimes due to cluster rebalacing and random settings default
// timeout is just not enough.
.waitForRelocatingShards(0))
.actionGet();
if (health.isTimedOut()) {
logger.info(
"cluster state:\n{}\n{}",
client().admin().cluster().prepareState().get().getState().prettyPrint(),
client().admin().cluster().preparePendingClusterTasks().get().prettyPrint());
assertThat("timed out waiting for green state", health.isTimedOut(), equalTo(false));
}
assertThat(health.getStatus(), equalTo(ClusterHealthStatus.GREEN));
final int numIterations = scaledRandomIntBetween(5, 20);
for (int i = 0; i < numIterations; i++) {
SearchResponse response = client().prepareSearch().setSize(numDocs).get();
assertHitCount(response, numDocs);
}
/*
* now hook into the IndicesService and register a close listener to
* run the checkindex. if the corruption is still there we will catch it.
*/
final CountDownLatch latch = new CountDownLatch(numShards * 3); // primary + 2 replicas
final CopyOnWriteArrayList<Exception> exception = new CopyOnWriteArrayList<>();
final IndexEventListener listener =
new IndexEventListener() {
@Override
public void afterIndexShardClosed(
ShardId sid, @Nullable IndexShard indexShard, Settings indexSettings) {
if (indexShard != null) {
Store store = indexShard.store();
store.incRef();
try {
if (!Lucene.indexExists(store.directory())
&& indexShard.state() == IndexShardState.STARTED) {
return;
}
try (CheckIndex checkIndex = new CheckIndex(store.directory())) {
BytesStreamOutput os = new BytesStreamOutput();
PrintStream out = new PrintStream(os, false, StandardCharsets.UTF_8.name());
checkIndex.setInfoStream(out);
out.flush();
CheckIndex.Status status = checkIndex.checkIndex();
if (!status.clean) {
logger.warn("check index [failure]\n{}", os.bytes().utf8ToString());
throw new IOException("index check failure");
}
}
} catch (Exception e) {
exception.add(e);
} finally {
store.decRef();
latch.countDown();
}
}
}
};
for (MockIndexEventListener.TestEventListener eventListener :
internalCluster().getDataNodeInstances(MockIndexEventListener.TestEventListener.class)) {
eventListener.setNewDelegate(listener);
}
try {
client().admin().indices().prepareDelete("test").get();
latch.await();
assertThat(exception, empty());
} finally {
for (MockIndexEventListener.TestEventListener eventListener :
internalCluster().getDataNodeInstances(MockIndexEventListener.TestEventListener.class)) {
eventListener.setNewDelegate(null);
}
}
}
public void testRelocationWhileRefreshing() throws Exception {
int numberOfRelocations = scaledRandomIntBetween(1, rarely() ? 10 : 4);
int numberOfReplicas = randomBoolean() ? 0 : 1;
int numberOfNodes = numberOfReplicas == 0 ? 2 : 3;
logger.info(
"testRelocationWhileIndexingRandom(numRelocations={}, numberOfReplicas={}, numberOfNodes={})",
numberOfRelocations,
numberOfReplicas,
numberOfNodes);
String[] nodes = new String[numberOfNodes];
logger.info("--> starting [node_0] ...");
nodes[0] = internalCluster().startNode();
logger.info("--> creating test index ...");
prepareCreate(
"test",
Settings.builder()
.put("index.number_of_shards", 1)
.put("index.number_of_replicas", numberOfReplicas)
.put("index.refresh_interval", -1) // we want to control refreshes c
)
.get();
for (int i = 1; i < numberOfNodes; i++) {
logger.info("--> starting [node_{}] ...", i);
nodes[i] = internalCluster().startNode();
if (i != numberOfNodes - 1) {
ClusterHealthResponse healthResponse =
client()
.admin()
.cluster()
.prepareHealth()
.setWaitForEvents(Priority.LANGUID)
.setWaitForNodes(Integer.toString(i + 1))
.setWaitForGreenStatus()
.execute()
.actionGet();
assertThat(healthResponse.isTimedOut(), equalTo(false));
}
}
final Semaphore postRecoveryShards = new Semaphore(0);
final IndexEventListener listener =
new IndexEventListener() {
@Override
public void indexShardStateChanged(
IndexShard indexShard,
@Nullable IndexShardState previousState,
IndexShardState currentState,
@Nullable String reason) {
if (currentState == IndexShardState.POST_RECOVERY) {
postRecoveryShards.release();
}
}
};
for (MockIndexEventListener.TestEventListener eventListener :
internalCluster().getInstances(MockIndexEventListener.TestEventListener.class)) {
eventListener.setNewDelegate(listener);
}
logger.info("--> starting relocations...");
int nodeShiftBased = numberOfReplicas; // if we have replicas shift those
for (int i = 0; i < numberOfRelocations; i++) {
int fromNode = (i % 2);
int toNode = fromNode == 0 ? 1 : 0;
fromNode += nodeShiftBased;
toNode += nodeShiftBased;
List<IndexRequestBuilder> builders1 = new ArrayList<>();
for (int numDocs = randomIntBetween(10, 30); numDocs > 0; numDocs--) {
builders1.add(client().prepareIndex("test", "type").setSource("{}"));
}
List<IndexRequestBuilder> builders2 = new ArrayList<>();
for (int numDocs = randomIntBetween(10, 30); numDocs > 0; numDocs--) {
builders2.add(client().prepareIndex("test", "type").setSource("{}"));
}
logger.info("--> START relocate the shard from {} to {}", nodes[fromNode], nodes[toNode]);
client()
.admin()
.cluster()
.prepareReroute()
.add(new MoveAllocationCommand("test", 0, nodes[fromNode], nodes[toNode]))
.get();
logger.debug("--> index [{}] documents", builders1.size());
indexRandom(false, true, builders1);
// wait for shard to reach post recovery
postRecoveryShards.acquire(1);
logger.debug("--> index [{}] documents", builders2.size());
indexRandom(true, true, builders2);
// verify cluster was finished.
assertFalse(
client()
.admin()
.cluster()
.prepareHealth()
.setWaitForNoRelocatingShards(true)
.setWaitForEvents(Priority.LANGUID)
.setTimeout("30s")
.get()
.isTimedOut());
logger.info("--> DONE relocate the shard from {} to {}", fromNode, toNode);
logger.debug("--> verifying all searches return the same number of docs");
long expectedCount = -1;
for (Client client : clients()) {
SearchResponse response =
client.prepareSearch("test").setPreference("_local").setSize(0).get();
assertNoFailures(response);
if (expectedCount < 0) {
expectedCount = response.getHits().totalHits();
} else {
assertEquals(expectedCount, response.getHits().totalHits());
}
}
}
}
