|
When using the ClientSession.withTransaction helper the MongoClient's serverSelectionTimeout value is not respected.
This same behavior does not happen if the transaction is manually created using ClientSession.startTransaction() and committed using ClientSession.commitTransaction
# setup
|
mlaunch init --replicaset --nodes 3 --hostname 192.168.2.13 --bind_ip_all --binarypath $(m bin 5.0.5-ent)
|
|
pom.xml
|
|
Show all
|
1
|
<?xml version="1.0" encoding="UTF-8"?>
|
2
|
|
3
|
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
|
4
|
<modelVersion>4.0.0</modelVersion>
|
5
|
|
6
|
<groupId>com.example</groupId>
|
7
|
<artifactId>demo</artifactId>
|
8
|
<version>1.0-SNAPSHOT</version>
|
9
|
|
10
|
<name>demo</name>
|
11
|
<!-- FIXME change it to the project's website -->
|
12
|
<url>http://www.example.com</url>
|
13
|
|
14
|
<properties>
|
15
|
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
|
16
|
<maven.compiler.source>1.8</maven.compiler.source>
|
17
|
<maven.compiler.target>1.8</maven.compiler.target>
|
18
|
</properties>
|
19
|
|
20
|
<dependencies>
|
21
|
<dependency>
|
22
|
<groupId>org.mongodb</groupId>
|
23
|
<artifactId>mongodb-driver-sync</artifactId>
|
24
|
<version>4.4.0</version>
|
25
|
</dependency>
|
26
|
</dependencies>
|
27
|
|
28
|
<build>
|
29
|
<pluginManagement>
|
30
|
<!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
|
31
|
<plugins>
|
32
|
<!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
|
33
|
<plugin>
|
34
|
<artifactId>maven-clean-plugin</artifactId>
|
35
|
<version>3.1.0</version>
|
36
|
</plugin>
|
37
|
<!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
|
38
|
<plugin>
|
39
|
<artifactId>maven-resources-plugin</artifactId>
|
40
|
<version>3.0.2</version>
|
41
|
</plugin>
|
42
|
<plugin>
|
43
|
<artifactId>maven-compiler-plugin</artifactId>
|
44
|
<version>3.8.0</version>
|
45
|
</plugin>
|
46
|
<plugin>
|
47
|
<artifactId>maven-surefire-plugin</artifactId>
|
48
|
<version>2.22.1</version>
|
49
|
</plugin>
|
50
|
<plugin>
|
51
|
<artifactId>maven-jar-plugin</artifactId>
|
52
|
<version>3.0.2</version>
|
53
|
</plugin>
|
54
|
<plugin>
|
55
|
<artifactId>maven-install-plugin</artifactId>
|
56
|
<version>2.5.2</version>
|
57
|
</plugin>
|
58
|
<plugin>
|
59
|
<artifactId>maven-deploy-plugin</artifactId>
|
60
|
<version>2.8.2</version>
|
61
|
</plugin>
|
62
|
<!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
|
63
|
<plugin>
|
64
|
<artifactId>maven-site-plugin</artifactId>
|
65
|
<version>3.7.1</version>
|
66
|
</plugin>
|
67
|
<plugin>
|
68
|
<artifactId>maven-project-info-reports-plugin</artifactId>
|
69
|
<version>3.0.0</version>
|
70
|
</plugin>
|
71
|
</plugins>
|
72
|
</pluginManagement>
|
73
|
</build>
|
74
|
</project>
|
|
EmptyServerSelector.java
|
|
Show all
|
1
|
package com.example;
|
2
|
|
3
|
import java.util.ArrayList;
|
4
|
import java.util.List;
|
5
|
import java.util.logging.Logger;
|
6
|
|
7
|
import com.mongodb.connection.ClusterDescription;
|
8
|
import com.mongodb.connection.ServerDescription;
|
9
|
import com.mongodb.selector.ServerSelector;
|
10
|
|
11
|
public class EmptyServerSelector implements ServerSelector {
|
12
|
private static Logger LOGGER = null;
|
13
|
static {
|
14
|
System.setProperty("java.util.logging.SimpleFormatter.format", "[%1$tF %1$tT] [%4$-7s] %5$s %n");
|
15
|
LOGGER = Logger.getLogger(EmptyServerSelector.class.getName());
|
16
|
}
|
17
|
|
18
|
@Override
|
19
|
public List<ServerDescription> select(ClusterDescription clusterDescription) {
|
20
|
LOGGER.info("Returning empty list of server descriptions");
|
21
|
return new ArrayList<>();
|
22
|
}
|
23
|
}
|
|
ServerSelectionTxnLoopTest.java
|
|
Show all
|
1
|
package com.example;
|
2
|
|
3
|
import java.util.Arrays;
|
4
|
import java.util.List;
|
5
|
import java.util.concurrent.TimeUnit;
|
6
|
|
7
|
import com.mongodb.*;
|
8
|
import com.mongodb.client.*;
|
9
|
import com.mongodb.client.result.UpdateResult;
|
10
|
|
11
|
import org.bson.Document;
|
12
|
import org.bson.conversions.Bson;
|
13
|
|
14
|
import static com.mongodb.client.model.Updates.inc;
|
15
|
import static com.mongodb.client.model.Filters.*;
|
16
|
|
17
|
public class ServerSelectionTxnLoopTest {
|
18
|
private static Bson _filter = eq("_id", 1);
|
19
|
private static Bson _update = inc("items.$.quantity", 2);
|
20
|
private static MongoCollection<Document> _coll;
|
21
|
|
22
|
private static void usingManualTransaction(ClientSession session) {
|
23
|
session.startTransaction(TransactionOptions.builder().writeConcern(WriteConcern.MAJORITY).build());
|
24
|
_coll.updateOne(session, _filter, _update);
|
25
|
session.commitTransaction();
|
26
|
}
|
27
|
|
28
|
private static void usingWithTransaction(ClientSession session) {
|
29
|
TransactionBody<UpdateResult> txnUpdateBody = () -> _coll.updateOne(session, _filter, _update);
|
30
|
session.withTransaction(txnUpdateBody);
|
31
|
}
|
32
|
|
33
|
public static void main(final String[] args) {
|
34
|
List<ServerAddress> hosts = Arrays.asList(
|
35
|
new ServerAddress("192.168.2.13:27017"),
|
36
|
new ServerAddress("192.168.2.13:27018"),
|
37
|
new ServerAddress("192.168.2.13:27019"));
|
38
|
|
39
|
MongoClient client = MongoClients.create(
|
40
|
MongoClientSettings.builder()
|
41
|
.applyToClusterSettings(builder -> builder
|
42
|
.hosts(hosts)
|
43
|
.serverSelector(new EmptyServerSelector())
|
44
|
.serverSelectionTimeout(2, TimeUnit.SECONDS))
|
45
|
.build());
|
46
|
|
47
|
System.out.println("MongoClient created with a serverSelectionTimeout of 2 seconds");
|
48
|
|
49
|
MongoDatabase db = client.getDatabase("test");
|
50
|
_coll = db.getCollection("foo");
|
51
|
|
52
|
ClientSession session = client.startSession();
|
53
|
try {
|
54
|
// usingManualTransaction(session); // this one will work
|
55
|
usingWithTransaction(session); // this one will FAIL
|
56
|
|
57
|
} catch (MongoCommandException | MongoWriteException e) {
|
58
|
session.abortTransaction();
|
59
|
} finally {
|
60
|
session.close();
|
61
|
}
|
62
|
}
|
63
|
}
|
If the above code is run with usingManualTransaction(session) uncommented, the application will exit with a MongoTimeoutException being raised after 2 seconds (as expected)
MongoClient created with a serverSelectionTimeout of 2 seconds
|
[2022-01-26 14:54:05] [INFO ] Returning empty list of server descriptions
|
...
|
[2022-01-26 14:54:07] [INFO ] Returning empty list of server descriptions
|
Exception in thread "main" com.mongodb.MongoTimeoutException: Timed out after 2000 ms while waiting for a server that matches WritableServerSelector. Client view of cluster state is {type=SHARDED, servers=[{address=192.168.2.13:27019, type=SHARD_ROUTER, roundTripTime=34.5 ms, state=CONNECTED}, {address=192.168.2.13:27017, type=SHARD_ROUTER, roundTripTime=32.0 ms, state=CONNECTED}, {address=192.168.2.13:27018, type=SHARD_ROUTER, roundTripTime=34.8 ms, state=CONNECTED}]
|
at com.mongodb.internal.connection.BaseCluster.createTimeoutException(BaseCluster.java:414)
|
at com.mongodb.internal.connection.BaseCluster.selectServer(BaseCluster.java:122)
|
at com.mongodb.internal.connection.AbstractMultiServerCluster.selectServer(AbstractMultiServerCluster.java:50)
|
at com.mongodb.internal.binding.ClusterBinding.getWriteConnectionSource(ClusterBinding.java:128)
|
at com.mongodb.client.internal.ClientSessionBinding.getPinnedConnectionSource(ClientSessionBinding.java:133)
|
at com.mongodb.client.internal.ClientSessionBinding.getWriteConnectionSource(ClientSessionBinding.java:102)
|
at com.mongodb.internal.operation.OperationHelper.withSuppliedResource(OperationHelper.java:581)
|
at com.mongodb.internal.operation.OperationHelper.withSourceAndConnection(OperationHelper.java:562)
|
at com.mongodb.internal.operation.MixedBulkWriteOperation.lambda$execute$3(MixedBulkWriteOperation.java:232)
|
at com.mongodb.internal.async.function.RetryingSyncSupplier.get(RetryingSyncSupplier.java:65)
|
at com.mongodb.internal.operation.MixedBulkWriteOperation.execute(MixedBulkWriteOperation.java:268)
|
at com.mongodb.internal.operation.MixedBulkWriteOperation.execute(MixedBulkWriteOperation.java:84)
|
at com.mongodb.client.internal.MongoClientDelegate$DelegateOperationExecutor.execute(MongoClientDelegate.java:212)
|
at com.mongodb.client.internal.MongoCollectionImpl.executeSingleWriteRequest(MongoCollectionImpl.java:1010)
|
at com.mongodb.client.internal.MongoCollectionImpl.executeUpdate(MongoCollectionImpl.java:994)
|
at com.mongodb.client.internal.MongoCollectionImpl.updateOne(MongoCollectionImpl.java:591)
|
at com.mongodb.client.internal.MongoCollectionImpl.updateOne(MongoCollectionImpl.java:584)
|
at com.example.App.usingManualTransaction(App.java:24)
|
at com.example.App.main(App.java:54)
|
If however this is run with the usingWithTransaction(session) call uncommented the application will loop for 2 minutes and then exit, though the MongoTimeoutException that is thrown indicates the configured 2 second value:
MongoClient created with a serverSelectionTimeout of 2 seconds
|
[2022-01-26 14:07:53] [INFO ] Returning empty list of server descriptions
|
...
|
[2022-01-26 14:09:54] [INFO ] Returning empty list of server descriptions
|
Exception in thread "main" com.mongodb.MongoTimeoutException: Timed out after 2000 ms while waiting for a server that matches WritableServerSelector. Client view of cluster state is {type=SHARDED, servers=[{address=192.168.2.13:27019, type=SHARD_ROUTER, roundTripTime=7.7 ms, state=CONNECTED}, {address=192.168.2.13:27017, type=SHARD_ROUTER, roundTripTime=7.7 ms, state=CONNECTED}, {address=192.168.2.13:27018, type=SHARD_ROUTER, roundTripTime=7.6 ms, state=CONNECTED}]
|
at com.mongodb.internal.connection.BaseCluster.createTimeoutException(BaseCluster.java:414)
|
at com.mongodb.internal.connection.BaseCluster.selectServer(BaseCluster.java:122)
|
at com.mongodb.internal.connection.AbstractMultiServerCluster.selectServer(AbstractMultiServerCluster.java:50)
|
at com.mongodb.internal.binding.ClusterBinding.getWriteConnectionSource(ClusterBinding.java:128)
|
at com.mongodb.client.internal.ClientSessionBinding.getPinnedConnectionSource(ClientSessionBinding.java:133)
|
at com.mongodb.client.internal.ClientSessionBinding.getWriteConnectionSource(ClientSessionBinding.java:102)
|
at com.mongodb.internal.operation.OperationHelper.withSuppliedResource(OperationHelper.java:581)
|
at com.mongodb.internal.operation.OperationHelper.withSourceAndConnection(OperationHelper.java:562)
|
at com.mongodb.internal.operation.MixedBulkWriteOperation.lambda$execute$3(MixedBulkWriteOperation.java:232)
|
at com.mongodb.internal.async.function.RetryingSyncSupplier.get(RetryingSyncSupplier.java:65)
|
at com.mongodb.internal.operation.MixedBulkWriteOperation.execute(MixedBulkWriteOperation.java:268)
|
at com.mongodb.internal.operation.MixedBulkWriteOperation.execute(MixedBulkWriteOperation.java:84)
|
at com.mongodb.client.internal.MongoClientDelegate$DelegateOperationExecutor.execute(MongoClientDelegate.java:212)
|
at com.mongodb.client.internal.MongoCollectionImpl.executeSingleWriteRequest(MongoCollectionImpl.java:1010)
|
at com.mongodb.client.internal.MongoCollectionImpl.executeUpdate(MongoCollectionImpl.java:994)
|
at com.mongodb.client.internal.MongoCollectionImpl.updateOne(MongoCollectionImpl.java:591)
|
at com.mongodb.client.internal.MongoCollectionImpl.updateOne(MongoCollectionImpl.java:584)
|
at com.example.App.lambda$0(App.java:29)
|
at com.mongodb.client.internal.ClientSessionImpl.withTransaction(ClientSessionImpl.java:211)
|
at com.mongodb.client.internal.ClientSessionImpl.withTransaction(ClientSessionImpl.java:199)
|
at com.example.App.usingWithTransaction(App.java:30)
|
at com.example.App.main(App.java:55)
|
|