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Posted to common-issues@hadoop.apache.org by GitBox <gi...@apache.org> on 2021/11/25 05:42:42 UTC

[GitHub] [hadoop] functioner opened a new pull request #3719: HADOOP-18024. SocketChannel is not closed when IOException happens in Server$Listener.doAccept

functioner opened a new pull request #3719:
URL: https://github.com/apache/hadoop/pull/3719


   ### Description of PR
   
   [HADOOP-18024](https://issues.apache.org/jira/browse/HADOOP-18024)
   
   ### How was this patch tested?
   
   
   ### For code changes:
   
   - [ ] Does the title or this PR starts with the corresponding JIRA issue id (e.g. 'HADOOP-17799. Your PR title ...')?
   - [ ] Object storage: have the integration tests been executed and the endpoint declared according to the connector-specific documentation?
   - [ ] If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under [ASF 2.0](http://www.apache.org/legal/resolved.html#category-a)?
   - [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`, `NOTICE-binary` files?
   
   


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[GitHub] [hadoop] functioner commented on pull request #3719: HADOOP-18024. SocketChannel is not closed when IOException happens in Server$Listener.doAccept

Posted by GitBox <gi...@apache.org>.
functioner commented on pull request #3719:
URL: https://github.com/apache/hadoop/pull/3719#issuecomment-978854702


   This is a follow-up for https://github.com/apache/hadoop/pull/2727.
   @iwasakims @ferhui We previously had some discussion in https://github.com/apache/hadoop/pull/2727. So if you have time, you can take a look at this new patch.


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[GitHub] [hadoop] hadoop-yetus commented on pull request #3719: HADOOP-18024. SocketChannel is not closed when IOException happens in Server$Listener.doAccept

Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on pull request #3719:
URL: https://github.com/apache/hadoop/pull/3719#issuecomment-986338899


   :confetti_ball: **+1 overall**
   
   
   
   
   
   
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   This message was automatically generated.
   
   


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[GitHub] [hadoop] virajjasani commented on pull request #3719: HADOOP-18024. SocketChannel is not closed when IOException happens in Server$Listener.doAccept

Posted by GitBox <gi...@apache.org>.
virajjasani commented on pull request #3719:
URL: https://github.com/apache/hadoop/pull/3719#issuecomment-988524111


   +1 (non-binding), Thanks @functioner 


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[GitHub] [hadoop] functioner commented on pull request #3719: HADOOP-18024. SocketChannel is not closed when IOException happens in Server$Listener.doAccept

Posted by GitBox <gi...@apache.org>.
functioner commented on pull request #3719:
URL: https://github.com/apache/hadoop/pull/3719#issuecomment-986142771


   @virajjasani Thank you for pointing out the checkstyle issue. I've pushed a new commit to resolve it.
   To minimize the checkstyle modification, I move the `configureSocketChannel` method from `Server$Listener` to `Server`, so that we can solely override this method to enable the unit test. `Server$Listener` remains `private`.
   I also add the `@VisibleForTesting` and `@InterfaceAudience.Private` annotations.


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[GitHub] [hadoop] hadoop-yetus commented on pull request #3719: HADOOP-18024. SocketChannel is not closed when IOException happens in Server$Listener.doAccept

Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on pull request #3719:
URL: https://github.com/apache/hadoop/pull/3719#issuecomment-986161987


   :broken_heart: **-1 overall**
   
   
   
   
   
   
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   This message was automatically generated.
   
   


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[GitHub] [hadoop] hadoop-yetus commented on pull request #3719: HADOOP-18024. SocketChannel is not closed when IOException happens in Server$Listener.doAccept

Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on pull request #3719:
URL: https://github.com/apache/hadoop/pull/3719#issuecomment-982079839


   :broken_heart: **-1 overall**
   
   
   
   
   
   
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   |||| _ Prechecks _ |
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   | +1 :green_heart: |  unit  |  17m 54s |  |  hadoop-common in the patch passed.  |
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   |  |   | 208m 26s |  |  |
   
   
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   | Powered by | Apache Yetus 0.14.0-SNAPSHOT https://yetus.apache.org |
   
   
   This message was automatically generated.
   
   


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[GitHub] [hadoop] virajjasani commented on pull request #3719: HADOOP-18024. SocketChannel is not closed when IOException happens in Server$Listener.doAccept

Posted by GitBox <gi...@apache.org>.
virajjasani commented on pull request #3719:
URL: https://github.com/apache/hadoop/pull/3719#issuecomment-986573767


   Seems better. Thanks @functioner. Once more checkstyle warning is pending related to Javadoc.


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[GitHub] [hadoop] hadoop-yetus commented on pull request #3719: HADOOP-18024. SocketChannel is not closed when IOException happens in Server$Listener.doAccept

Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on pull request #3719:
URL: https://github.com/apache/hadoop/pull/3719#issuecomment-978983225


   :broken_heart: **-1 overall**
   
   
   
   
   
   
   | Vote | Subsystem | Runtime |  Logfile | Comment |
   |:----:|----------:|--------:|:--------:|:-------:|
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   |||| _ trunk Compile Tests _ |
   | +1 :green_heart: |  mvninstall  |  33m 21s |  |  trunk passed  |
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   | +1 :green_heart: |  compile  |  19m 25s |  |  the patch passed with JDK Private Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10  |
   | +1 :green_heart: |  javac  |  19m 25s |  |  the patch passed  |
   | +1 :green_heart: |  blanks  |   0m  0s |  |  The patch has no blanks issues.  |
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   | +1 :green_heart: |  javadoc  |   1m 39s |  |  the patch passed with JDK Private Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10  |
   | +1 :green_heart: |  spotbugs  |   2m 45s |  |  the patch passed  |
   | +1 :green_heart: |  shadedclient  |  22m 37s |  |  patch has no errors when building and testing our client artifacts.  |
   |||| _ Other Tests _ |
   | +1 :green_heart: |  unit  |  17m 43s |  |  hadoop-common in the patch passed.  |
   | +1 :green_heart: |  asflicense  |   0m 54s |  |  The patch does not generate ASF License warnings.  |
   |  |   | 199m 19s |  |  |
   
   
   | Subsystem | Report/Notes |
   |----------:|:-------------|
   | Docker | ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3719/1/artifact/out/Dockerfile |
   | GITHUB PR | https://github.com/apache/hadoop/pull/3719 |
   | Optional Tests | dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell |
   | uname | Linux e25179bc9802 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 23:41:39 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux |
   | Build tool | maven |
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   | git revision | trunk / b0f8903268f6d234e15ec004fc7c3661aba2a816 |
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   |  Test Results | https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3719/1/testReport/ |
   | Max. process+thread count | 1281 (vs. ulimit of 5500) |
   | modules | C: hadoop-common-project/hadoop-common U: hadoop-common-project/hadoop-common |
   | Console output | https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3719/1/console |
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[GitHub] [hadoop] functioner commented on pull request #3719: HADOOP-18024. SocketChannel is not closed when IOException happens in Server$Listener.doAccept

Posted by GitBox <gi...@apache.org>.
functioner commented on pull request #3719:
URL: https://github.com/apache/hadoop/pull/3719#issuecomment-985853038


   @virajjasani I've pushed a commit for the unit test `testIOEOnListenerAccept`. I've confirmed that it can pass only if we have this patch.
   The inspiration comes from `hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/ipc/TestIPC.java`. I leverage some existing scaffolds in `TestIPC.java`:
   https://github.com/apache/hadoop/blob/c0f405a46b402b4bdf5b7771f5124790fc866965/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/ipc/TestIPC.java#L487-L532
   https://github.com/apache/hadoop/blob/c0f405a46b402b4bdf5b7771f5124790fc866965/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/ipc/TestIPC.java#L420-L425
   Then I just override some methods of `TestServer` and `Server$Listener` to inject the IOException.
   In `testIOEOnListenerAccept`, the first client call encounters the injection in server and thus gets its socket closed. Hence we expect `EOFException`. The second client call should work normally.
   Any comment or suggestion? Thank you!


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[GitHub] [hadoop] iwasakims commented on pull request #3719: HADOOP-18024. SocketChannel is not closed when IOException happens in Server$Listener.doAccept

Posted by GitBox <gi...@apache.org>.
iwasakims commented on pull request #3719:
URL: https://github.com/apache/hadoop/pull/3719#issuecomment-988657975


   I merged this. Thanks, @functioner and @virajjasani.


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[GitHub] [hadoop] functioner edited a comment on pull request #3719: HADOOP-18024. SocketChannel is not closed when IOException happens in Server$Listener.doAccept

Posted by GitBox <gi...@apache.org>.
functioner edited a comment on pull request #3719:
URL: https://github.com/apache/hadoop/pull/3719#issuecomment-986302972


   This time, `testIOEOnListenerAccept` failed. I haven't figured out the reason. The previous CI tests and my tests in local machine always pass. So I added a log for the unexpected error to see what happened.


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[GitHub] [hadoop] functioner commented on pull request #3719: HADOOP-18024. SocketChannel is not closed when IOException happens in Server$Listener.doAccept

Posted by GitBox <gi...@apache.org>.
functioner commented on pull request #3719:
URL: https://github.com/apache/hadoop/pull/3719#issuecomment-986580363


   @virajjasani Sorry that I overlooked this. I've just pushed a new commit.


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[GitHub] [hadoop] functioner commented on a change in pull request #3719: HADOOP-18024. SocketChannel is not closed when IOException happens in Server$Listener.doAccept

Posted by GitBox <gi...@apache.org>.
functioner commented on a change in pull request #3719:
URL: https://github.com/apache/hadoop/pull/3719#discussion_r758649585



##########
File path: hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/Server.java
##########
@@ -1536,9 +1536,19 @@ void doAccept(SelectionKey key) throws InterruptedException, IOException,  OutOf
       SocketChannel channel;
       while ((channel = server.accept()) != null) {
 
-        channel.configureBlocking(false);
-        channel.socket().setTcpNoDelay(tcpNoDelay);
-        channel.socket().setKeepAlive(true);
+        try {
+          channel.configureBlocking(false);
+          channel.socket().setTcpNoDelay(tcpNoDelay);
+          channel.socket().setKeepAlive(true);
+        } catch (IOException e) {
+          LOG.warn("Error in an accepted SocketChannel", e);
+          try {
+            channel.socket().close();
+            channel.close();
+          } catch (IOException ignored) {

Review comment:
       I've added the log in a new commit. Thanks




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[GitHub] [hadoop] functioner edited a comment on pull request #3719: HADOOP-18024. SocketChannel is not closed when IOException happens in Server$Listener.doAccept

Posted by GitBox <gi...@apache.org>.
functioner edited a comment on pull request #3719:
URL: https://github.com/apache/hadoop/pull/3719#issuecomment-978854702


   This is a follow-up for https://github.com/apache/hadoop/pull/2727.
   @iwasakims @ferhui We previously had some discussion in https://github.com/apache/hadoop/pull/2727. So if you have time, you can take a look at this new patch. Thank you!


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[GitHub] [hadoop] virajjasani commented on a change in pull request #3719: HADOOP-18024. SocketChannel is not closed when IOException happens in Server$Listener.doAccept

Posted by GitBox <gi...@apache.org>.
virajjasani commented on a change in pull request #3719:
URL: https://github.com/apache/hadoop/pull/3719#discussion_r758405866



##########
File path: hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/Server.java
##########
@@ -1536,9 +1536,19 @@ void doAccept(SelectionKey key) throws InterruptedException, IOException,  OutOf
       SocketChannel channel;
       while ((channel = server.accept()) != null) {
 
-        channel.configureBlocking(false);
-        channel.socket().setTcpNoDelay(tcpNoDelay);
-        channel.socket().setKeepAlive(true);
+        try {
+          channel.configureBlocking(false);
+          channel.socket().setTcpNoDelay(tcpNoDelay);
+          channel.socket().setKeepAlive(true);
+        } catch (IOException e) {
+          LOG.warn("Error in an accepted SocketChannel", e);
+          try {
+            channel.socket().close();
+            channel.close();
+          } catch (IOException ignored) {

Review comment:
       Good to log Exception here as Channel could not be closed




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[GitHub] [hadoop] functioner commented on pull request #3719: HADOOP-18024. SocketChannel is not closed when IOException happens in Server$Listener.doAccept

Posted by GitBox <gi...@apache.org>.
functioner commented on pull request #3719:
URL: https://github.com/apache/hadoop/pull/3719#issuecomment-986302972


   This time, `testIOEOnListenerAccept` failed. I haven't figured out the reason. The previous CI tests and my location tests always pass. So I added a log for the unexpected error to see what happened.


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[GitHub] [hadoop] virajjasani commented on a change in pull request #3719: HADOOP-18024. SocketChannel is not closed when IOException happens in Server$Listener.doAccept

Posted by GitBox <gi...@apache.org>.
virajjasani commented on a change in pull request #3719:
URL: https://github.com/apache/hadoop/pull/3719#discussion_r762454550



##########
File path: hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/Server.java
##########
@@ -1530,15 +1530,30 @@ private void closeCurrentConnection(SelectionKey key, Throwable e) {
     InetSocketAddress getAddress() {
       return (InetSocketAddress)acceptChannel.socket().getLocalSocketAddress();
     }
-    
+
+    protected void configureSocketChannel(SocketChannel channel) throws IOException {

Review comment:
       Same here, good to annotate with IA.Private and VFT

##########
File path: hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/Server.java
##########
@@ -1325,7 +1325,7 @@ public String toString() {
   }
 
   /** Listens on the socket. Creates jobs for the handler threads*/
-  private class Listener extends Thread {
+  protected class Listener extends Thread {

Review comment:
       Would have been better if we could keep this private, but it seems we have no better way if we want to test this change (Thanks for the test btw). If we are going to go forward with this, we should annotate this as `@VisibleForTesting` and `@InterfaceAudience.Private`.
   
   Let's also get some expert advice on this. cc @aajisaka @ayushtkn @jojochuang 




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[GitHub] [hadoop] hadoop-yetus commented on pull request #3719: HADOOP-18024. SocketChannel is not closed when IOException happens in Server$Listener.doAccept

Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on pull request #3719:
URL: https://github.com/apache/hadoop/pull/3719#issuecomment-986740867


   :confetti_ball: **+1 overall**
   
   
   
   
   
   
   | Vote | Subsystem | Runtime |  Logfile | Comment |
   |:----:|----------:|--------:|:--------:|:-------:|
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   |||| _ Prechecks _ |
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   |||| _ trunk Compile Tests _ |
   | +1 :green_heart: |  mvninstall  |  32m 12s |  |  trunk passed  |
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   |||| _ Patch Compile Tests _ |
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   |||| _ Other Tests _ |
   | +1 :green_heart: |  unit  |  19m 34s |  |  hadoop-common in the patch passed.  |
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   |----------:|:-------------|
   | Docker | ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3719/6/artifact/out/Dockerfile |
   | GITHUB PR | https://github.com/apache/hadoop/pull/3719 |
   | Optional Tests | dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell |
   | uname | Linux 54e3cb03e760 4.15.0-156-generic #163-Ubuntu SMP Thu Aug 19 23:31:58 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux |
   | Build tool | maven |
   | Personality | dev-support/bin/hadoop.sh |
   | git revision | trunk / 5dbf246d45f4fe73e73d2db7d9c0fa4bff3bdccb |
   | Default Java | Private Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10 |
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   |  Test Results | https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3719/6/testReport/ |
   | Max. process+thread count | 2803 (vs. ulimit of 5500) |
   | modules | C: hadoop-common-project/hadoop-common U: hadoop-common-project/hadoop-common |
   | Console output | https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3719/6/console |
   | versions | git=2.25.1 maven=3.6.3 spotbugs=4.2.2 |
   | Powered by | Apache Yetus 0.14.0-SNAPSHOT https://yetus.apache.org |
   
   
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[GitHub] [hadoop] hadoop-yetus commented on pull request #3719: HADOOP-18024. SocketChannel is not closed when IOException happens in Server$Listener.doAccept

Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on pull request #3719:
URL: https://github.com/apache/hadoop/pull/3719#issuecomment-985935902


   :confetti_ball: **+1 overall**
   
   
   
   
   
   
   | Vote | Subsystem | Runtime |  Logfile | Comment |
   |:----:|----------:|--------:|:--------:|:-------:|
   | +0 :ok: |  reexec  |   1m 25s |  |  Docker mode activated.  |
   |||| _ Prechecks _ |
   | +1 :green_heart: |  dupname  |   0m  0s |  |  No case conflicting files found.  |
   | +0 :ok: |  codespell  |   0m  1s |  |  codespell was not available.  |
   | +1 :green_heart: |  @author  |   0m  0s |  |  The patch does not contain any @author tags.  |
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   |||| _ trunk Compile Tests _ |
   | +1 :green_heart: |  mvninstall  |  35m 40s |  |  trunk passed  |
   | +1 :green_heart: |  compile  |  25m  4s |  |  trunk passed with JDK Ubuntu-11.0.11+9-Ubuntu-0ubuntu2.20.04  |
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   | +1 :green_heart: |  shadedclient  |  25m 42s |  |  branch has no errors when building and testing our client artifacts.  |
   |||| _ Patch Compile Tests _ |
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   |||| _ Other Tests _ |
   | +1 :green_heart: |  unit  |  17m 57s |  |  hadoop-common in the patch passed.  |
   | +1 :green_heart: |  asflicense  |   1m  2s |  |  The patch does not generate ASF License warnings.  |
   |  |   | 213m  6s |  |  |
   
   
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   | Docker | ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3719/3/artifact/out/Dockerfile |
   | GITHUB PR | https://github.com/apache/hadoop/pull/3719 |
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   | uname | Linux 00fa48069eb5 4.15.0-65-generic #74-Ubuntu SMP Tue Sep 17 17:06:04 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux |
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   | git revision | trunk / f7540e419293db72caec53323ca20f89d89e95db |
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   | Max. process+thread count | 1367 (vs. ulimit of 5500) |
   | modules | C: hadoop-common-project/hadoop-common U: hadoop-common-project/hadoop-common |
   | Console output | https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3719/3/console |
   | versions | git=2.25.1 maven=3.6.3 spotbugs=4.2.2 |
   | Powered by | Apache Yetus 0.14.0-SNAPSHOT https://yetus.apache.org |
   
   
   This message was automatically generated.
   
   


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[GitHub] [hadoop] functioner commented on pull request #3719: HADOOP-18024. SocketChannel is not closed when IOException happens in Server$Listener.doAccept

Posted by GitBox <gi...@apache.org>.
functioner commented on pull request #3719:
URL: https://github.com/apache/hadoop/pull/3719#issuecomment-988311271


   Are there any other issues or concern with the current patch and test? If any, I will resolve ASAP. Will this PR be merged soon by any chance?


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[GitHub] [hadoop] iwasakims merged pull request #3719: HADOOP-18024. SocketChannel is not closed when IOException happens in Server$Listener.doAccept

Posted by GitBox <gi...@apache.org>.
iwasakims merged pull request #3719:
URL: https://github.com/apache/hadoop/pull/3719


   


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