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Posted to commits@tinkerpop.apache.org by sp...@apache.org on 2016/03/01 23:57:20 UTC
[1/4] incubator-tinkerpop git commit: General fix to allow
server-side fails to be reconnected.
Repository: incubator-tinkerpop
Updated Branches:
refs/heads/TINKERPOP-956 [created] 0ff4e8285
General fix to allow server-side fails to be reconnected.
If a server is responding to the driver in an expected fashion, then the server is still valid, but it may have killed the channel. If it killed the channel and the driver tries to reconnect on that channel then future requests on that connection would immediately fail and the host would then get marked as dead (when it really wasn't). Made some basic adjustments here to allow a Connection facing this situation to replace itself in the pool with a fresh connection which would open a new channel on the server and thus allow the next request using it to actually work.
Project: http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/repo
Commit: http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/commit/fba51aa1
Tree: http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/tree/fba51aa1
Diff: http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/diff/fba51aa1
Branch: refs/heads/TINKERPOP-956
Commit: fba51aa14afca428a1819685f8313be1b0ec3526
Parents: b2145cb
Author: Stephen Mallette <sp...@genoprime.com>
Authored: Tue Mar 1 15:44:44 2016 -0500
Committer: Stephen Mallette <sp...@genoprime.com>
Committed: Tue Mar 1 15:44:44 2016 -0500
----------------------------------------------------------------------
.../tinkerpop/gremlin/driver/Connection.java | 30 ++++++++++++++++++++
.../gremlin/driver/ConnectionPool.java | 2 +-
.../tinkerpop/gremlin/driver/ResultQueue.java | 5 ++--
.../server/GremlinServerIntegrateTest.java | 15 +++++++---
4 files changed, 44 insertions(+), 8 deletions(-)
----------------------------------------------------------------------
http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/blob/fba51aa1/gremlin-driver/src/main/java/org/apache/tinkerpop/gremlin/driver/Connection.java
----------------------------------------------------------------------
diff --git a/gremlin-driver/src/main/java/org/apache/tinkerpop/gremlin/driver/Connection.java b/gremlin-driver/src/main/java/org/apache/tinkerpop/gremlin/driver/Connection.java
index cb26781..9767fbd 100644
--- a/gremlin-driver/src/main/java/org/apache/tinkerpop/gremlin/driver/Connection.java
+++ b/gremlin-driver/src/main/java/org/apache/tinkerpop/gremlin/driver/Connection.java
@@ -27,6 +27,7 @@ import io.netty.channel.socket.nio.NioSocketChannel;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
+import java.io.IOException;
import java.net.URI;
import java.util.UUID;
import java.util.concurrent.CompletableFuture;
@@ -185,6 +186,9 @@ final class Connection {
} else {
final LinkedBlockingQueue<Result> resultLinkedBlockingQueue = new LinkedBlockingQueue<>();
final CompletableFuture<Void> readCompleted = new CompletableFuture<>();
+
+ // the callback for when the read was successful, meaning that ResultQueue.markComplete()
+ // was called
readCompleted.thenAcceptAsync(v -> {
thisConnection.returnToPool();
@@ -194,6 +198,32 @@ final class Connection {
shutdown(closeFuture.get());
}, cluster.executor());
+ // the callback for when the read failed. a failed read means the request went to the server
+ // and came back with a server-side error of some sort. it means the server is responsive
+ // so this isn't going to be like a dead host situation which is handled above on a failed
+ // write operation.
+ //
+ // in the event of an IOException, that will typically mean that the Connection might have
+ // been closed from the server side. this is typical in situations like when a request is
+ // sent that exceeds maxContentLength (the server closes the channel on its side). if the
+ // Connection is simply returned to the pool then it will be used again on a future request
+ // and the server will refuse it and make it appear as a dead host as the write will not
+ // succeed. instead, the Connection gets replaced which destroys the dead channel on the
+ // client and allows a new one to be reconstructed.
+ readCompleted.exceptionally(t -> {
+ if (t instanceof IOException)
+ if (pool != null) pool.replaceConnection(thisConnection);
+ else
+ thisConnection.returnToPool();
+
+ // close was signaled in closeAsync() but there were pending messages at that time. attempt
+ // the shutdown if the returned result cleared up the last pending message
+ if (isClosed() && pending.isEmpty())
+ shutdown(closeFuture.get());
+
+ return null;
+ });
+
final ResultQueue handler = new ResultQueue(resultLinkedBlockingQueue, readCompleted);
pending.put(requestMessage.getRequestId(), handler);
future.complete(new ResultSet(handler, cluster.executor(), readCompleted));
http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/blob/fba51aa1/gremlin-driver/src/main/java/org/apache/tinkerpop/gremlin/driver/ConnectionPool.java
----------------------------------------------------------------------
diff --git a/gremlin-driver/src/main/java/org/apache/tinkerpop/gremlin/driver/ConnectionPool.java b/gremlin-driver/src/main/java/org/apache/tinkerpop/gremlin/driver/ConnectionPool.java
index f18d25e..aab9646 100644
--- a/gremlin-driver/src/main/java/org/apache/tinkerpop/gremlin/driver/ConnectionPool.java
+++ b/gremlin-driver/src/main/java/org/apache/tinkerpop/gremlin/driver/ConnectionPool.java
@@ -248,7 +248,7 @@ final class ConnectionPool {
return futures.toArray(new CompletableFuture[futures.size()]);
}
- private void replaceConnection(final Connection connection) {
+ void replaceConnection(final Connection connection) {
logger.debug("Replace {}", connection);
open.decrementAndGet();
http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/blob/fba51aa1/gremlin-driver/src/main/java/org/apache/tinkerpop/gremlin/driver/ResultQueue.java
----------------------------------------------------------------------
diff --git a/gremlin-driver/src/main/java/org/apache/tinkerpop/gremlin/driver/ResultQueue.java b/gremlin-driver/src/main/java/org/apache/tinkerpop/gremlin/driver/ResultQueue.java
index 0ee7640..1a55edc 100644
--- a/gremlin-driver/src/main/java/org/apache/tinkerpop/gremlin/driver/ResultQueue.java
+++ b/gremlin-driver/src/main/java/org/apache/tinkerpop/gremlin/driver/ResultQueue.java
@@ -21,6 +21,7 @@ package org.apache.tinkerpop.gremlin.driver;
import org.apache.tinkerpop.gremlin.driver.message.ResponseMessage;
import org.javatuples.Pair;
+import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
@@ -110,9 +111,7 @@ final class ResultQueue {
void markError(final Throwable throwable) {
error.set(throwable);
-
- // unsure if this should really complete exceptionally rather than just complete.
- this.readComplete.complete(null);
+ this.readComplete.completeExceptionally(throwable);
this.flushWaiting();
}
http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/blob/fba51aa1/gremlin-server/src/test/java/org/apache/tinkerpop/gremlin/server/GremlinServerIntegrateTest.java
----------------------------------------------------------------------
diff --git a/gremlin-server/src/test/java/org/apache/tinkerpop/gremlin/server/GremlinServerIntegrateTest.java b/gremlin-server/src/test/java/org/apache/tinkerpop/gremlin/server/GremlinServerIntegrateTest.java
index 61c1a98..3ddaaf6 100644
--- a/gremlin-server/src/test/java/org/apache/tinkerpop/gremlin/server/GremlinServerIntegrateTest.java
+++ b/gremlin-server/src/test/java/org/apache/tinkerpop/gremlin/server/GremlinServerIntegrateTest.java
@@ -40,6 +40,7 @@ import org.apache.tinkerpop.gremlin.server.channel.NioChannelizer;
import org.apache.tinkerpop.gremlin.server.op.session.SessionOpProcessor;
import org.apache.tinkerpop.gremlin.structure.util.detached.DetachedVertex;
import org.apache.tinkerpop.gremlin.util.Log4jRecordingAppender;
+import org.hamcrest.CoreMatchers;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
@@ -61,6 +62,7 @@ import java.util.stream.IntStream;
import static org.hamcrest.CoreMatchers.containsString;
import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.core.IsInstanceOf.instanceOf;
import static org.hamcrest.core.IsNot.not;
import static org.hamcrest.core.StringEndsWith.endsWith;
import static org.hamcrest.core.StringStartsWith.startsWith;
@@ -552,7 +554,8 @@ public class GremlinServerIntegrateTest extends AbstractGremlinServerIntegration
client.submit("def class C { def C getC(){return this}}; new C()").all().join();
fail("Should throw an exception.");
} catch (RuntimeException re) {
- assertTrue(re.getCause().getCause().getMessage().startsWith("Error during serialization: Direct self-reference leading to cycle (through reference chain:"));
+ final Throwable root = ExceptionUtils.getRootCause(re);
+ assertThat(root.getMessage(), CoreMatchers.startsWith("Error during serialization: Direct self-reference leading to cycle (through reference chain:"));
// validate that we can still send messages to the server
assertEquals(2, client.submit("1+1").all().join().get(0).getInt());
@@ -570,7 +573,8 @@ public class GremlinServerIntegrateTest extends AbstractGremlinServerIntegration
client.submit("java.awt.Color.RED").all().join();
fail("Should throw an exception.");
} catch (RuntimeException re) {
- assertTrue(re.getCause().getCause().getMessage().startsWith("Error during serialization: Class is not registered: java.awt.Color"));
+ final Throwable root = ExceptionUtils.getRootCause(re);
+ assertThat(root.getMessage(), CoreMatchers.startsWith("Error during serialization: Class is not registered: java.awt.Color"));
// validate that we can still send messages to the server
assertEquals(2, client.submit("1+1").all().join().get(0).getInt());
@@ -599,6 +603,9 @@ public class GremlinServerIntegrateTest extends AbstractGremlinServerIntegration
} catch (Exception re) {
final Throwable root = ExceptionUtils.getRootCause(re);
assertEquals("Connection reset by peer", root.getMessage());
+
+ // validate that we can still send messages to the server
+ assertEquals(2, client.submit("1+1").all().join().get(0).getInt());
} finally {
cluster.close();
}
@@ -659,8 +666,8 @@ public class GremlinServerIntegrateTest extends AbstractGremlinServerIntegration
client.submit("x[1]+2").all().get();
fail("Session should be dead");
} catch (Exception ex) {
- final Exception cause = (Exception) ex.getCause().getCause();
- assertTrue(cause instanceof ResponseException);
+ final Throwable cause = ExceptionUtils.getCause(ex);
+ assertThat(cause, instanceOf(ResponseException.class));
assertEquals(ResponseStatusCode.SERVER_ERROR_SCRIPT_EVALUATION, ((ResponseException) cause).getResponseStatusCode());
// validate that we can still send messages to the server
[4/4] incubator-tinkerpop git commit: Update changelog.
Posted by sp...@apache.org.
Update changelog.
Project: http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/repo
Commit: http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/commit/0ff4e828
Tree: http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/tree/0ff4e828
Diff: http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/diff/0ff4e828
Branch: refs/heads/TINKERPOP-956
Commit: 0ff4e8285a939e75c66636057c9cc287cc1cba64
Parents: 9e1b5b1
Author: Stephen Mallette <sp...@genoprime.com>
Authored: Tue Mar 1 17:56:42 2016 -0500
Committer: Stephen Mallette <sp...@genoprime.com>
Committed: Tue Mar 1 17:56:42 2016 -0500
----------------------------------------------------------------------
CHANGELOG.asciidoc | 1 +
1 file changed, 1 insertion(+)
----------------------------------------------------------------------
http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/blob/0ff4e828/CHANGELOG.asciidoc
----------------------------------------------------------------------
diff --git a/CHANGELOG.asciidoc b/CHANGELOG.asciidoc
index 009b69b..a54fffd 100644
--- a/CHANGELOG.asciidoc
+++ b/CHANGELOG.asciidoc
@@ -26,6 +26,7 @@ image::https://raw.githubusercontent.com/apache/incubator-tinkerpop/master/docs/
TinkerPop 3.1.2 (NOT OFFICIALLY RELEASED YET)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+* Improved the recovery options for Gremlin Driver after failed requests to Gremlin Server.
* Bumped to Netty 4.0.34.Final.
* Added "interpreter mode" for the `ScriptEngine` and Gremlin Server which allows variables defined with `def` or a type to be recognized as "global".
* Bumped to Apache Groovy 2.4.6.
[3/4] incubator-tinkerpop git commit: Ignored the
shouldHandleRequestSentThatNeverReturns() test for driver.
Posted by sp...@apache.org.
Ignored the shouldHandleRequestSentThatNeverReturns() test for driver.
This test never wants to behave not matter is done to it to firm it up. It seems to rely a little too heavily on timing to be consistent.
Project: http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/repo
Commit: http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/commit/9e1b5b12
Tree: http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/tree/9e1b5b12
Diff: http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/diff/9e1b5b12
Branch: refs/heads/TINKERPOP-956
Commit: 9e1b5b12da38f0c13573cbea25a94f18a4cab104
Parents: 4abb58b
Author: Stephen Mallette <sp...@genoprime.com>
Authored: Tue Mar 1 17:33:49 2016 -0500
Committer: Stephen Mallette <sp...@genoprime.com>
Committed: Tue Mar 1 17:33:49 2016 -0500
----------------------------------------------------------------------
.../apache/tinkerpop/gremlin/server/GremlinDriverIntegrateTest.java | 1 +
1 file changed, 1 insertion(+)
----------------------------------------------------------------------
http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/blob/9e1b5b12/gremlin-server/src/test/java/org/apache/tinkerpop/gremlin/server/GremlinDriverIntegrateTest.java
----------------------------------------------------------------------
diff --git a/gremlin-server/src/test/java/org/apache/tinkerpop/gremlin/server/GremlinDriverIntegrateTest.java b/gremlin-server/src/test/java/org/apache/tinkerpop/gremlin/server/GremlinDriverIntegrateTest.java
index 609055f..9fc6930 100644
--- a/gremlin-server/src/test/java/org/apache/tinkerpop/gremlin/server/GremlinDriverIntegrateTest.java
+++ b/gremlin-server/src/test/java/org/apache/tinkerpop/gremlin/server/GremlinDriverIntegrateTest.java
@@ -596,6 +596,7 @@ public class GremlinDriverIntegrateTest extends AbstractGremlinServerIntegration
}
@Test
+ @org.junit.Ignore("Can't seem to make this test pass consistently")
public void shouldHandleRequestSentThatNeverReturns() throws Exception {
final Cluster cluster = Cluster.open();
final Client client = cluster.connect();
[2/4] incubator-tinkerpop git commit: Minor refactoring to extract
Connection shutdown function.
Posted by sp...@apache.org.
Minor refactoring to extract Connection shutdown function.
Project: http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/repo
Commit: http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/commit/4abb58bf
Tree: http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/tree/4abb58bf
Diff: http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/diff/4abb58bf
Branch: refs/heads/TINKERPOP-956
Commit: 4abb58bf5df63b71d2ccab893f7f9f354e2391a1
Parents: fba51aa
Author: Stephen Mallette <sp...@genoprime.com>
Authored: Tue Mar 1 16:52:27 2016 -0500
Committer: Stephen Mallette <sp...@genoprime.com>
Committed: Tue Mar 1 16:52:27 2016 -0500
----------------------------------------------------------------------
.../tinkerpop/gremlin/driver/Connection.java | 18 +++++++++++-------
1 file changed, 11 insertions(+), 7 deletions(-)
----------------------------------------------------------------------
http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/blob/4abb58bf/gremlin-driver/src/main/java/org/apache/tinkerpop/gremlin/driver/Connection.java
----------------------------------------------------------------------
diff --git a/gremlin-driver/src/main/java/org/apache/tinkerpop/gremlin/driver/Connection.java b/gremlin-driver/src/main/java/org/apache/tinkerpop/gremlin/driver/Connection.java
index 9767fbd..10d3b89 100644
--- a/gremlin-driver/src/main/java/org/apache/tinkerpop/gremlin/driver/Connection.java
+++ b/gremlin-driver/src/main/java/org/apache/tinkerpop/gremlin/driver/Connection.java
@@ -191,11 +191,7 @@ final class Connection {
// was called
readCompleted.thenAcceptAsync(v -> {
thisConnection.returnToPool();
-
- // close was signaled in closeAsync() but there were pending messages at that time. attempt
- // the shutdown if the returned result cleared up the last pending message
- if (isClosed() && pending.isEmpty())
- shutdown(closeFuture.get());
+ tryShutdown();
}, cluster.executor());
// the callback for when the read failed. a failed read means the request went to the server
@@ -218,8 +214,7 @@ final class Connection {
// close was signaled in closeAsync() but there were pending messages at that time. attempt
// the shutdown if the returned result cleared up the last pending message
- if (isClosed() && pending.isEmpty())
- shutdown(closeFuture.get());
+ tryShutdown();
return null;
});
@@ -243,6 +238,15 @@ final class Connection {
}
}
+ /**
+ * Close was signaled in closeAsync() but there were pending messages at that time. This method attempts the
+ * shutdown if the returned result cleared up the last pending message.
+ */
+ private void tryShutdown() {
+ if (isClosed() && pending.isEmpty())
+ shutdown(closeFuture.get());
+ }
+
private void shutdown(final CompletableFuture<Void> future) {
// shutdown can be called directly from closeAsync() or after write() and therefore this method should only
// be called once. once shutdown is initiated, it shoudln't be executed a second time or else it sends more