deadlock when closing the session

[Nitu Choudhary]

Hi,
I am seeing a deadlock when trying to close the session, please check the stack trace below. The version of nio client we are using is:
          <dependency>


                <groupId>org.apache.httpcomponents</groupId>

                <artifactId>httpcore-nio</artifactId>

                <version>4.4.6</version>

            </dependency>

            <dependency>

                <groupId>org.apache.httpcomponents</groupId>

                <artifactId>httpasyncclient</artifactId>

                <version>4.1.3</version>

            </dependency>



Java stack information for the threads listed above:
===================================================

"Thread-313":

        at java.nio.channels.spi.AbstractSelectionKey.cancel(AbstractSelectionKey.java:70)

        - waiting to lock <0x00002b9628ab9860> (a sun.nio.ch.SelectionKeyImpl)

        at java.nio.channels.spi.AbstractSelectableChannel.implCloseChannel(AbstractSelectableChannel.java:240)

        - locked <0x00002b9628ab9b98> (a java.lang.Object)

        at java.nio.channels.spi.AbstractInterruptibleChannel.close(AbstractInterruptibleChannel.java:115)

        - locked <0x00002b9628ab9808> (a java.lang.Object)

        at org.apache.http.impl.nio.reactor.SessionRequestImpl.cancel(SessionRequestImpl.java:216)

        at org.apache.http.nio.pool.AbstractNIOConnPool.shutdown(AbstractNIOConnPool.java:216)

        at org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager.shutdown(PoolingNHttpClientConnectionManager.java:206)

        at org.apache.http.impl.nio.client.CloseableHttpAsyncClientBase.close(CloseableHttpAsyncClientBase.java:99)

        at com.yahoo.ymail.common.http.internal.HttpAsyncClientJmxEnabled.close(HttpAsyncClientJmxEnabled.java:452)

        at com.yahoo.ymail.xmas.common.http.HttpAsyncClientWrapper$1.run(HttpAsyncClientWrapper.java:75)

        at java.lang.Thread.run(Thread.java:748)

"I/O dispatcher 119":

        at java.nio.channels.spi.AbstractInterruptibleChannel.close(AbstractInterruptibleChannel.java:111)

        - waiting to lock <0x00002b9628ab9808> (a java.lang.Object)

        at org.apache.http.impl.nio.reactor.IOSessionImpl.close(IOSessionImpl.java:227)

        - locked <0x00002b9628ab9860> (a sun.nio.ch.SelectionKeyImpl)

        at org.apache.http.impl.nio.reactor.IOSessionImpl.shutdown(IOSessionImpl.java:255)

        at org.apache.http.impl.nio.reactor.AbstractIODispatch.connected(AbstractIODispatch.java:89)

        at org.apache.http.impl.nio.reactor.BaseIOReactor.sessionCreated(BaseIOReactor.java:248)

        at org.apache.http.impl.nio.reactor.AbstractIOReactor.processNewChannels(AbstractIOReactor.java:427)

        at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:287)

        at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104)

        at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:588)

        at java.lang.Thread.run(Thread.java:748)






Regards,nitu

[Oleg Kalnichevski]

Post by Nitu Choudhary
Hi,
I am seeing a deadlock when trying to close the session, please check

Nitu

Could you please upgrade to the latest release of HttpCore and see if
that solves the problem?

Oleg

Post by Nitu Choudhary
          <dependency>
                <groupId>org.apache.httpcomponents</groupId>
                <artifactId>httpcore-nio</artifactId>
                <version>4.4.6</version>
            </dependency>
            <dependency>
                <groupId>org.apache.httpcomponents</groupId>
                <artifactId>httpasyncclient</artifactId>
                <version>4.1.3</version>
            </dependency>
===================================================
        at
java.nio.channels.spi.AbstractSelectionKey.cancel(AbstractSelectionKe
y.java:70)
        - waiting to lock <0x00002b9628ab9860> (a
sun.nio.ch.SelectionKeyImpl)
        at
java.nio.channels.spi.AbstractSelectableChannel.implCloseChannel(Abst
ractSelectableChannel.java:240)
        - locked <0x00002b9628ab9b98> (a java.lang.Object)
        at
java.nio.channels.spi.AbstractInterruptibleChannel.close(AbstractInte
rruptibleChannel.java:115)
        - locked <0x00002b9628ab9808> (a java.lang.Object)
        at
org.apache.http.impl.nio.reactor.SessionRequestImpl.cancel(SessionReq
uestImpl.java:216)
        at
org.apache.http.nio.pool.AbstractNIOConnPool.shutdown(AbstractNIOConn
Pool.java:216)
        at
org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager.shu
tdown(PoolingNHttpClientConnectionManager.java:206)
        at
org.apache.http.impl.nio.client.CloseableHttpAsyncClientBase.close(Cl
oseableHttpAsyncClientBase.java:99)
        at
com.yahoo.ymail.common.http.internal.HttpAsyncClientJmxEnabled.close(
HttpAsyncClientJmxEnabled.java:452)
        at
com.yahoo.ymail.xmas.common.http.HttpAsyncClientWrapper$1.run(HttpAsy
ncClientWrapper.java:75)
        at java.lang.Thread.run(Thread.java:748)
        at
java.nio.channels.spi.AbstractInterruptibleChannel.close(AbstractInte
rruptibleChannel.java:111)
        - waiting to lock <0x00002b9628ab9808> (a java.lang.Object)
        at
org.apache.http.impl.nio.reactor.IOSessionImpl.close(IOSessionImpl.ja
va:227)
        - locked <0x00002b9628ab9860> (a sun.nio.ch.SelectionKeyImpl)
        at
org.apache.http.impl.nio.reactor.IOSessionImpl.shutdown(IOSessionImpl
.java:255)
        at
org.apache.http.impl.nio.reactor.AbstractIODispatch.connected(Abstrac
tIODispatch.java:89)
        at
org.apache.http.impl.nio.reactor.BaseIOReactor.sessionCreated(BaseIOR
eactor.java:248)
        at
org.apache.http.impl.nio.reactor.AbstractIOReactor.processNewChannels
(AbstractIOReactor.java:427)
        at
org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIO
Reactor.java:287)
        at
org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.
java:104)
        at
org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.
run(AbstractMultiworkerIOReactor.java:588)
        at java.lang.Thread.run(Thread.java:748)
Regards,nitu

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