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https://issues.apache.org/jira/browse/FLINK-9878?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16552555#comment-16552555
]
ASF GitHub Bot commented on FLINK-9878:
---------------------------------------
Github user pnowojski commented on a diff in the pull request:
https://github.com/apache/flink/pull/6355#discussion_r204329756
--- Diff:
flink-runtime/src/test/java/org/apache/flink/runtime/io/network/netty/NettyClientServerSslTest.java
---
@@ -65,6 +68,60 @@ public void testValidSslConnection() throws Exception {
Channel ch = NettyTestUtil.connect(serverAndClient);
+ SslHandler sslHandler = (SslHandler) ch.pipeline().get("ssl");
+ assertTrue("default value should not be propagated",
sslHandler.getHandshakeTimeoutMillis() >= 0);
+ assertTrue("default value should not be propagated",
sslHandler.getCloseNotifyTimeoutMillis() >= 0);
+
+ // should be able to send text data
+ ch.pipeline().addLast(new StringDecoder()).addLast(new
StringEncoder());
+ assertTrue(ch.writeAndFlush("test").await().isSuccess());
+
+ NettyTestUtil.shutdown(serverAndClient);
+ }
+
+ /**
+ * Verify valid (advanced) ssl configuration and connection.
+ */
+ @Test
+ public void testValidSslConnectionAdvanced() throws Exception {
--- End diff --
please deduplicate code with `testValidSslConnection`
> IO worker threads BLOCKED on SSL Session Cache while CMS full gc
> ----------------------------------------------------------------
>
> Key: FLINK-9878
> URL: https://issues.apache.org/jira/browse/FLINK-9878
> Project: Flink
> Issue Type: Bug
> Components: Network
> Affects Versions: 1.5.0, 1.5.1, 1.6.0
> Reporter: Nico Kruber
> Assignee: Nico Kruber
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.5.2, 1.6.0
>
>
> According to https://github.com/netty/netty/issues/832, there is a JDK issue
> during garbage collection when the SSL session cache is not limited. We
> should allow the user to configure this and further (advanced) SSL parameters
> for fine-tuning to fix this and similar issues. In particular, the following
> parameters should be configurable:
> - SSL session cache size
> - SSL session timeout
> - SSL handshake timeout
> - SSL close notify flush timeout
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