JDK-8215102 (Follow-up)

Dennis Gesker dennis at gesker.com
Tue Jan 22 14:22:52 UTC 2019


Thank you for the test exception, Jaikiran! I just got to the office and
was about to do the same thing.

I didn't think It was a WildFly issue. WildFly was just where I first
noticed the warning.

Again, thank you, Sir.

--drg

On Tue, Jan 22, 2019 at 5:44 AM Jaikiran Pai <jai.forums2013 at gmail.com>
wrote:

> FWIW - I don't think this is related to WildFly server. So I decided to
> try and reproduce this in a trivial standalone program and I was able to
> reproduce this. Here's the code to reproduce this issue:
>
>
> import java.sql.*;
>
> public class ConnectionCloseTest {
>
>     public static void main(final String[] args) throws Exception {
>         final String url = "jdbc:mysql://localhost/?requireSSL=true";
>         final String user = "youruser"; // set the right user
>         final String pass = "yourpassword"; // set the right password
>         Class.forName("com.mysql.jdbc.Driver");
>         final Connection conn = DriverManager.getConnection(url, user,
> pass);
>         System.out.println("Got connection");
>         conn.close();
>         System.out.println("Closed connection");
>     }
>
> }
>
> It's important to start the MySQL server with ssl enabled. For that I just
> had to set:
>
> [mysqld]
> ssl=1
>
> in my MySQL server configuration. On the client side you will need the
> mysql JDBC driver jar in the classpath. The one I used for this test was
> mysql-connector-java-5.1.43.jar.
>
> Running this with Java 8 doesn't throw any exceptions or WARN logs.
> However, running it against Java 11 and even Java 12 latest EA build,
> throws an exception, which gets logged as a WARN by the driver (and things
> move on) on connection close:
>
>
> WARN: Caught while disconnecting...
>
> EXCEPTION STACK TRACE:
>
>
>
> ** BEGIN NESTED EXCEPTION **
>
> javax.net.ssl.SSLException
> MESSAGE: closing inbound before receiving peer's close_notify
>
> STACKTRACE:
>
> javax.net.ssl.SSLException: closing inbound before receiving peer's
> close_notify
>     at java.base/sun.security.ssl.Alert.createSSLException(Alert.java:133)
>     at java.base/sun.security.ssl.Alert.createSSLException(Alert.java:117)
>     at
> java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:307)
>     at
> java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:263)
>     at
> java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:254)
>     at
> java.base/sun.security.ssl.SSLSocketImpl.shutdownInput(SSLSocketImpl.java:650)
>     at
> java.base/sun.security.ssl.SSLSocketImpl.shutdownInput(SSLSocketImpl.java:629)
>     at com.mysql.jdbc.MysqlIO.quit(MysqlIO.java:2246)
>     at com.mysql.jdbc.ConnectionImpl.realClose(ConnectionImpl.java:4234)
>     at com.mysql.jdbc.ConnectionImpl.close(ConnectionImpl.java:1472)
>     at ConnectionCloseTest.main(ConnectionCloseTest.java:13)
>     at
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native
> Method)
>     at
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>     at
> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>     at java.base/java.lang.reflect.Method.invoke(Method.java:567)
>     at
> jdk.compiler/com.sun.tools.javac.launcher.Main.execute(Main.java:415)
>     at jdk.compiler/com.sun.tools.javac.launcher.Main.run(Main.java:192)
>     at jdk.compiler/com.sun.tools.javac.launcher.Main.main(Main.java:132)
>
>
> ** END NESTED EXCEPTION **
>
> -Jaikiran
>
>
> On 22/01/19 7:43 AM, Dennis Gesker wrote:
>
> Hi Severing:
>
> I'll post the generic error when I get to the office. It seems to throw
> the complaints when it closes a connection.
>
> Here is the thing...
>
> 1. I'm glad this found its way to you (being Red Hat guy) as we first
> noticed it in WildFly 15.0.1.  (But, wasn't looking for it before as we
> only need it for a few XA migration transactions.)
>
> 2. It MIGHT be the driver as we use PostgreSQL driver mostly -- in the
> same container -- and no errors there on WildFly 15.0.1 and JDK 11.
>
> 3. I will also try to fall back to JDK 8 and see if it continues in
> WildFly 15.0.1.
>
> 4. The error occurs -- it would seem -- as the pool closes idle
> connections.
>
> 5.  I'll post the pool/data source config in WildFly as well -- it seems
> correct and seems to work OK in my application.
>
> Oh, yeah...
>
> And, I found the form to be a contributor (not comitter) and will fill
> that out tomorrow as well and submit it to you directly.
>
> --drg
>
> On Mon, Jan 21, 2019, 09:23 Severin Gehwolf <sgehwolf at redhat.com wrote:
>
>> On Mon, 2019-01-21 at 07:57 -0700, Dennis Gesker wrote:
>> >
>> > Pasted:
>> >
>> > https://paste.fedoraproject.org/paste/vEvp9RwN2rVvIKGiC0IvEQ
>> <https://mailtrack.io/trace/link/11b29b5ee0001da18d81231a7716414eb9fb8cf6?url=https%3A%2F%2Fpaste.fedoraproject.org%2Fpaste%2FvEvp9RwN2rVvIKGiC0IvEQ&userId=3240016&signature=15582aac23a1d344>
>>
>> Is this the full trace? I don't see any exceptions happening in the
>> log. Am I missing something?
>>
>> Thanks,
>> Severin
>>
>> > On Mon, Jan 21, 2019 at 2:10 AM Severin Gehwolf <sgehwolf at redhat.com>
>> > wrote:
>> > > Hi Dennis,
>> > >
>> > > On Sat, 2019-01-19 at 12:08 -0700, Dennis Gesker wrote:
>> > > > Hi Severin:
>> > > >
>> > > > A link to the txt file via Google Drive his here.
>> > >
>> > > "Sorry, the file you have requested does not exist."
>> > >
>> > > Could you please upload it somewhere less restricted? Maybe
>> > > https://paste.fedoraproject.org/
>> <https://mailtrack.io/trace/link/70123ad1da54dd30f90d4c9440498fb67a9dad69?url=https%3A%2F%2Fpaste.fedoraproject.org%2F&userId=3240016&signature=5db291affc051142>
>> or something similar?
>> > >
>> > > I guess if you include me directly, a file attachment would work
>> > > too...
>> > > It's the mailing lists which strip attachments.
>> > >
>> > > > I appreciate you and Alan taking a look. Especially, information
>> > > > submitted from someone who is not a part of openjdk project.
>> > > > I do hope the debug info helps. Let me know anything else you
>> > > need
>> > > > and I will do my best to provide it.
>> > >
>> > > Sure. I'll be mostly doing the intermediary work: getting the info
>> > > added to the bug, though.
>> > >
>> > > > And, should your team decide to open a new ticket or reopen this
>> > > > original ticket in the JIRA could you add me to the ticket?
>> > >
>> > > You'd have to become OpenJDK author for this[1]. It's not terribly
>> > > difficult, but it's somewhat of an entry barrier I understand.
>> > >
>> > > > BTW, (off topic), would your recommend submitting a contributor
>> > > > application to the openjdk project so bug reports can be
>> > > submitted
>> > > > directly?
>> > >
>> > > If you intend to submit the occasional bug report and fix it's
>> > > easier
>> > > for you long-term to attempt to become OpenJDK author (which
>> > > requires
>> > > signing the OCA[2]).
>> > >
>> > > > The dev group at my company is VERY small (and this message to
>> > > your
>> > > > group at the project is from my personal email) but I'd be glad
>> > > to
>> > > > submit bug reports as we come across them in our day to day use
>> > > of
>> > > > Java.
>> > >
>> > > If there are good reproducers for bugs this would be very welcome.
>> > > Thanks for investing some time in this!
>> > >
>> > > Cheers,
>> > > Severin
>> > >
>> > > [1] http://openjdk.java.net/bylaws#author
>> <https://mailtrack.io/trace/link/100b2b16add0f9efa569b40c35d0034070f13adf?url=http%3A%2F%2Fopenjdk.java.net%2Fbylaws%23author&userId=3240016&signature=040ae6d9192cd351>
>> > >     http://openjdk.java.net/projects/#project-author
>> <https://mailtrack.io/trace/link/377fa21aeb632c6d04c744d70e816e23fb506afc?url=http%3A%2F%2Fopenjdk.java.net%2Fprojects%2F%23project-author&userId=3240016&signature=dbf523efea173590>
>> > > [2] http://oss.oracle.com/oca.pdf
>> <https://mailtrack.io/trace/link/994d4b4757fa32117b29fae74179a75e0a36fa95?url=http%3A%2F%2Foss.oracle.com%2Foca.pdf&userId=3240016&signature=946fe1d98e179a0d>
>> > >
>> > > > Cordially,
>> > > > Dennis
>> > > > dennis at gesker.com
>> > > >
>> > > > On Fri, Jan 18, 2019 at 10:07 AM Severin Gehwolf <
>> > > sgehwolf at redhat.com
>> > > > > wrote:
>> > > > > On Thu, 2019-01-17 at 10:00 -0700, Dennis Gesker wrote:
>> > > > > [...]
>> > > > > > Added the  -Djavax.net.debug=all option to my Wildfly startup
>> > > and
>> > > > > > waited for the pool to close a connection to MySql at AWS.
>> > > > > >
>> > > > > > TXT file attached.
>> > > > > >
>> > > > > > javac 11.0.1
>> > > > > > mysql jdbc driver 8.0.13
>> > > > > > wildfly 15.0.1
>> > > > > >
>> > > > > > --drg
>> > > > >
>> > > > > Unfortunately the txt file got stripped by the mailing list.
>> > > Would
>> > > > > you
>> > > > > be able to upload it somewhere and post a link?
>> > > > >
>> > > > > Thanks,
>> > > > > Severin
>> > > > >
>> > > >
>> > > >
>> > >
>> >
>> >
>>
>>

-- 

Dennis R. Gesker
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