[英]Cassandra-unit : java.io.IOException: Connection reset by peer
I'm trying out Embedded Cassandra using cassandra-unit and ran into the following exception, 我正在使用cassandra-unit尝试使用Embedded Cassandra并遇到以下异常,
com.datastax.driver.core.exceptions.NoHostAvailableException: All host(s) tried for query failed (tried: /127.0.0.1 (com.datastax.driver.core.ConnectionException: [/127.0.0.1] Unexpected error during transport initialization (com.datastax.driver.core.TransportException: [/127.0.0.1] Unexpected exception triggered (java.io.IOException: Connection reset by peer))))
at com.datastax.driver.core.ControlConnection.reconnectInternal(ControlConnection.java:195)
at com.datastax.driver.core.ControlConnection.connect(ControlConnection.java:78)
at com.datastax.driver.core.Cluster$Manager.init(Cluster.java:1029)
at com.datastax.driver.core.Cluster.init(Cluster.java:120)
at com.datastax.driver.core.SessionManager.init(SessionManager.java:61)
at com.datastax.driver.core.SessionManager.execute(SessionManager.java:416)
at com.datastax.driver.core.SessionManager.executeQuery(SessionManager.java:453)
at com.datastax.driver.core.SessionManager.executeAsync(SessionManager.java:103)
at com.datastax.driver.core.SessionManager.execute(SessionManager.java:91)
at com.datastax.driver.core.SessionManager.execute(SessionManager.java:83)
at com.me.cc.bma.cassandra.test.main(test.java:30)
for the following code, 对于以下代码,
import com.datastax.driver.core.Cluster;
import org.cassandraunit.CQLDataLoader;
import org.cassandraunit.dataset.CQLDataSet;
import org.cassandraunit.dataset.cql.ClassPathCQLDataSet;
import org.cassandraunit.utils.EmbeddedCassandraServerHelper;
import org.apache.cassandra.config.DatabaseDescriptor;
import com.datastax.driver.core.ResultSet;
import static com.datastax.driver.core.Cluster.builder;
import com.datastax.driver.core.Session;
public class Test{
static Session session;
public static void main(String args[]) throws Exception {
EmbeddedCassandraServerHelper.startEmbeddedCassandra(500000L);
Cluster.Builder clusterBuilder = builder().addContactPoint("127.0.0.1").withClusterName(EmbeddedCassandraServerHelper.getClusterName()).withPort(7010);
Cluster cluster = clusterBuilder.build();
session = cluster.newSession();
try {
session.execute("CREATE KEYSPACE ci WITH replication = {'class': 'SimpleStrategy', 'replication_factor': 1}");
session = cluster.connect("ci");
session.execute("CREATE TABLE login (l_id int)");
session.execute("insert into login(l_id) values(1)");
ResultSet res = session.execute("select * from login");
System.out.println(res.all());
}
catch (Exception ex) {
ex.printStackTrace();
}
}
}
Versions: 版本:
Any fix would be appreciated! 任何修复将不胜感激!
I faced the same issue some time back and found the artifact versions were incorrect and non-compatible due to conflict in maven. 我在一段时间后面临同样的问题,发现由于maven冲突,工件版本不正确且不兼容。
I am using below versions and works fine for me: 我正在使用以下版本,并为我工作正常:
Cassandra-all: 2.1.14 Cassandra-unit: 2.1.9.2 Cassandra-driver-core: 3.3.2 Cassandra-all:2.1.14 Cassandra-unit:2.1.9.2 Cassandra-driver-core:3.3.2
Also there is a cool way to start embedded Cassandra using @EmbeddedCassandra Annotation which does the base work for you. 还有一种很酷的方法可以使用@EmbeddedCassandra Annotation启动嵌入式Cassandra,它可以帮助您完成基础工作。
Hope this works for you too. 希望这也适合你。
change port to 9142 the default cassndra native transport port. 将端口更改为9142默认的cassndra本地传输端口。
Cluster.builder().addContactPoint("127.0.0.1").withClusterName(EmbeddedCassandraServerHelper.getClusterName()).withPort(9142);
Also specify PRIMARY KEY in your create table query 还要在create table query中指定PRIMARY KEY
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