Hi All,

Every time I close the connection to our janus db, I get the following exception:

INFO (ConnectionPool.java:225) - Signalled closing of connection pool on Host{address=portal-ssl627-2.legendary-janusgraph-28.infinait.composedb.com/146.148.30.47:16138, hostUri=wss://portal-ssl627-2.legendary-janusgraph-28.infinait.composedb.com:16138/gremlin} with core size of 1

INFO (Connection.java:369) - Checking for pending messages to complete before close on org.apache.tinkerpop.gremlin.driver.Connection$CheckForPending@4b4cc069

INFO (Connection.java:369) - Checking for pending messages to complete before close on org.apache.tinkerpop.gremlin.driver.Connection$CheckForPending@4b4cc069

INFO (Connection.java:369) - Checking for pending messages to complete before close on org.apache.tinkerpop.gremlin.driver.Connection$CheckForPending@4b4cc069

INFO (Connection.java:369) - Checking for pending messages to complete before close on org.apache.tinkerpop.gremlin.driver.Connection$CheckForPending@4b4cc069

WARN (Connection.java:322) - Timeout while trying to close connection on 2a5f4ec3-e1c5-4d9c-8ee2-a08ad92d2499 - force closing - server will close session on shutdown or expiration.

java.util.concurrent.TimeoutException

at java.util.concurrent.CompletableFuture.timedGet(CompletableFuture.java:1771)

at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1915)

at org.apache.tinkerpop.gremlin.driver.Connection.shutdown(Connection.java:317)

at org.apache.tinkerpop.gremlin.driver.Connection.tryShutdown(Connection.java:296)

at org.apache.tinkerpop.gremlin.driver.Connection.lambda$null$1(Connection.java:215)

at java.util.concurrent.CompletableFuture.uniAccept(CompletableFuture.java:656)

at java.util.concurrent.CompletableFuture$UniAccept.tryFire(CompletableFuture.java:632)

at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:442)

at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)

at java.util.concurrent.FutureTask.run(FutureTask.java:266)

at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)

at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

at java.lang.Thread.run(Thread.java:745)

The code is simple:

public class JanusConnectionTest {

    private static final Map<String, Object> bindings;

    static {

        bindings = new HashMap<String, Object>();

        bindings.put("graph_name", "infinAIt");

    }

    public static void main(String args[]) throws Exception {

        String configFile = "conf\\compose.yaml";

        Cluster cluster = Cluster.open(configFile);

        Client client = cluster.connect(UUID.randomUUID().toString(), true);

        client.init();

        ResultSet rs = client.submit("def g = ConfiguredGraphFactory.open(graph_name); 0", bindings);

        System.out.println(rs.one());

        rs = client.submit("g.traversal().V().count()");

        System.out.println(rs.one());

        client.close();

        cluster.close();

    }

}

the yaml config file:

hosts: [portal-ssl627-2.legendary-janusgraph-28.infinait.composedb.com]

port: 

username: 

password:

connectionPool: { enableSsl: true }

serializer: { className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV1d0, config: { serializeResultToString: true }}

I tried 3.2.5 and 3.3.0, the exception is same.

        <!-- https://mvnrepository.com/artifact/org.apache.tinkerpop/gremlin-driver -->

        <dependency>

            <groupId>org.apache.tinkerpop</groupId>

            <artifactId>gremlin-driver</artifactId>

            <version>3.3.0</version>

        </dependency>

Perhaps the incorrect close cause our server memory leak. I am grateful for all the advice.

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