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Posted to reviews@kudu.apache.org by "Will Berkeley (Code Review)" <ge...@cloudera.org> on 2018/03/27 21:13:01 UTC

[kudu-CR](branch-1.6.x) java: reduce scary exception spew and improve logging

Hello Grant Henke,

I'd like you to do a code review. Please visit

    http://gerrit.cloudera.org:8080/9827

to review the following change.


Change subject: java: reduce scary exception spew and improve logging
......................................................................

java: reduce scary exception spew and improve logging

In real environments there are various types of failures that are
"expected". In particular, it's not unlikely for the client to
occasionally connect to a server which has gone down or which is not the
leader for a given tablet anymore. In that case, we should make sure
that the logging output is easy to read and doesn't include irrelevant
stack traces stemming from Netty internals.

This patch addresses several of those cases. In particular, it gets rid
of "unexpected exception" messages (and associated stacks) in the case
of "connection refused" errors. It also helpfully includes the
underlying error when invalidating the tablet cache for a location.

There's a relatively simple new unit test, and I also ran some
before/after comparisons using the "loadgen" sample from the
kudu-examples repo against a local cluster with one TS:

Case 1: Master down when we start the client:
============================================================

Before the patch
--------------
[New I/O worker #12] WARN org.apache.kudu.client.ConnectToCluster - Error receiving response from localhost:7051
org.apache.kudu.client.RecoverableException: connection closed
	at org.apache.kudu.client.Connection.channelClosed(Connection.java:254)
	at org.apache.kudu.shaded.org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:88)
	at org.apache.kudu.client.Connection.handleUpstream(Connection.java:238)
	at org.apache.kudu.shaded.org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
	at org.apache.kudu.shaded.org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
	at org.apache.kudu.shaded.org.jboss.netty.handler.timeout.ReadTimeoutHandler.channelClosed(ReadTimeoutHandler.java:176)
	at org.apache.kudu.shaded.org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:88)
	at org.apache.kudu.shaded.org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
	at org.apache.kudu.shaded.org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
	at org.apache.kudu.shaded.org.jboss.netty.handler.codec.oneone.OneToOneDecoder.handleUpstream(OneToOneDecoder.java:60)
	at org.apache.kudu.shaded.org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
	at org.apache.kudu.shaded.org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
	at org.apache.kudu.shaded.org.jboss.netty.handler.codec.frame.FrameDecoder.cleanup(FrameDecoder.java:493)
	at org.apache.kudu.shaded.org.jboss.netty.handler.codec.frame.FrameDecoder.channelClosed(FrameDecoder.java:371)
	at org.apache.kudu.shaded.org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:88)
	at org.apache.kudu.shaded.org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
	at org.apache.kudu.shaded.org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:559)
	at org.apache.kudu.shaded.org.jboss.netty.channel.Channels.fireChannelClosed(Channels.java:468)
	at org.apache.kudu.shaded.org.jboss.netty.channel.Channels$6.run(Channels.java:457)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.ChannelRunnableWrapper.run(ChannelRunnableWrapper.java:40)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.AbstractNioSelector.processTaskQueue(AbstractNioSelector.java:391)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:315)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
	at org.apache.kudu.shaded.org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
	at org.apache.kudu.shaded.org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
[New I/O boss #17] ERROR org.apache.kudu.client.Connection - [peer master-localhost:7051(localhost:7051)] unexpected exception from downstream on [id: 0xf9759051]
java.net.ConnectException: Connection refused: localhost/127.0.0.1:7051
	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.NioClientBoss.connect(NioClientBoss.java:152)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.NioClientBoss.processSelectedKeys(NioClientBoss.java:105)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.NioClientBoss.process(NioClientBoss.java:79)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:337)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.NioClientBoss.run(NioClientBoss.java:42)
	at org.apache.kudu.shaded.org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
	at org.apache.kudu.shaded.org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
[New I/O worker #12] WARN org.apache.kudu.client.ConnectToCluster - Unable to find the leader master localhost:7051; will retry

... repeats with exponential backoff

After the patch
--------------
[New I/O boss #17] INFO org.apache.kudu.client.Connection - Failed to connect to peer master-localhost:7051(localhost:7051): Connection refused: localhost/127.0.0.1:7051
[New I/O worker #1] INFO org.apache.kudu.client.ConnectToCluster - Unable to connect to master localhost:7051: Connection refused: localhost/127.0.0.1:7051
[New I/O worker #1] WARN org.apache.kudu.client.ConnectToCluster - Unable to find the leader master localhost:7051; will retry

... repeats with exponential backoff

Case 2: Tserver is down
============================================================

Before the patch
----------------
[New I/O worker #11] INFO org.apache.kudu.client.AsyncKuduClient - Removing server fc9f6ab955cc47a8ab3653d0170305b0 from this tablet's cache 9da164fbcd93404ea8e38e9491eb3fa8
[New I/O boss #17] ERROR org.apache.kudu.client.Connection - [peer fc9f6ab955cc47a8ab3653d0170305b0(todd-laptop:7050)] unexpected exception from downstream on [id: 0x270e3a82]
java.net.ConnectException: Connection refused: todd-laptop/127.0.1.1:7050
	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.NioClientBoss.connect(NioClientBoss.java:152)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.NioClientBoss.processSelectedKeys(NioClientBoss.java:105)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.NioClientBoss.process(NioClientBoss.java:79)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:337)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.NioClientBoss.run(NioClientBoss.java:42)
	at org.apache.kudu.shaded.org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
	at org.apache.kudu.shaded.org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)

... repeats with exponential backoff

After the patch
---------------
[New I/O boss #17] INFO org.apache.kudu.client.Connection - Failed to connect to peer fc9f6ab955cc47a8ab3653d0170305b0(todd-laptop:7050): Connection refused: todd-laptop/127.0.1.1:7050
[New I/O worker #15] INFO org.apache.kudu.client.AsyncKuduClient - Invalidating location fc9f6ab955cc47a8ab3653d0170305b0(todd-laptop:7050) for tablet 478ddbaafb5b494ea0de8e2d0ed45a00: Connection refused: todd-laptop/127.0.1.1:7050

... repeats with exponential backoff

Case 3: A tablet is bad
============================================================
In this case I manually delete a non-replicated tablet that is being written to
using 'kudu remote_replica delete'. This is unrecoverable since there is
no other replica.

Before the patch
-----------------
[New I/O worker #10] INFO org.apache.kudu.client.AsyncKuduClient - Removing server fc9f6ab955cc47a8ab3653d0170305b0 from this tablet's cache a633f4a0c14b4404a8ae1f825b378867

... repeats with exponential backoff

After the patch
----------------
[New I/O worker #9] INFO org.apache.kudu.client.AsyncKuduClient - Invalidating location 36622c46b25f4da9ada43f8591728053(todd-laptop:7050) for tablet c0b9488597e8447595ad0ee0a3378f95: Tablet not RUNNING: STOPPED

... repeats with exponential backoff

Change-Id: I4b8be871693fecc1ee46a4e238dd2ed8f0730d4b
Reviewed-on: http://gerrit.cloudera.org:8080/9644
Reviewed-by: Grant Henke <gr...@gmail.com>
Tested-by: Grant Henke <gr...@gmail.com>
---
M java/kudu-client/src/main/java/org/apache/kudu/client/AsyncKuduClient.java
M java/kudu-client/src/main/java/org/apache/kudu/client/ConnectToCluster.java
M java/kudu-client/src/main/java/org/apache/kudu/client/Connection.java
M java/kudu-client/src/test/java/org/apache/kudu/client/TestClientFailoverSupport.java
M java/kudu-client/src/test/java/org/apache/kudu/client/TestKuduClient.java
5 files changed, 78 insertions(+), 7 deletions(-)



  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/27/9827/1
-- 
To view, visit http://gerrit.cloudera.org:8080/9827
To unsubscribe, visit http://gerrit.cloudera.org:8080/settings

Gerrit-Project: kudu
Gerrit-Branch: branch-1.6.x
Gerrit-MessageType: newchange
Gerrit-Change-Id: I4b8be871693fecc1ee46a4e238dd2ed8f0730d4b
Gerrit-Change-Number: 9827
Gerrit-PatchSet: 1
Gerrit-Owner: Will Berkeley <wd...@gmail.com>
Gerrit-Reviewer: Grant Henke <gr...@apache.org>
Gerrit-Reviewer: Todd Lipcon <to...@apache.org>

[kudu-CR](branch-1.6.x) java: reduce scary exception spew and improve logging

Posted by "Will Berkeley (Code Review)" <ge...@cloudera.org>.
Will Berkeley has submitted this change and it was merged. ( http://gerrit.cloudera.org:8080/9827 )

Change subject: java: reduce scary exception spew and improve logging
......................................................................

java: reduce scary exception spew and improve logging

In real environments there are various types of failures that are
"expected". In particular, it's not unlikely for the client to
occasionally connect to a server which has gone down or which is not the
leader for a given tablet anymore. In that case, we should make sure
that the logging output is easy to read and doesn't include irrelevant
stack traces stemming from Netty internals.

This patch addresses several of those cases. In particular, it gets rid
of "unexpected exception" messages (and associated stacks) in the case
of "connection refused" errors. It also helpfully includes the
underlying error when invalidating the tablet cache for a location.

There's a relatively simple new unit test, and I also ran some
before/after comparisons using the "loadgen" sample from the
kudu-examples repo against a local cluster with one TS:

Case 1: Master down when we start the client:
============================================================

Before the patch
--------------
[New I/O worker #12] WARN org.apache.kudu.client.ConnectToCluster - Error receiving response from localhost:7051
org.apache.kudu.client.RecoverableException: connection closed
	at org.apache.kudu.client.Connection.channelClosed(Connection.java:254)
	at org.apache.kudu.shaded.org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:88)
	at org.apache.kudu.client.Connection.handleUpstream(Connection.java:238)
	at org.apache.kudu.shaded.org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
	at org.apache.kudu.shaded.org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
	at org.apache.kudu.shaded.org.jboss.netty.handler.timeout.ReadTimeoutHandler.channelClosed(ReadTimeoutHandler.java:176)
	at org.apache.kudu.shaded.org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:88)
	at org.apache.kudu.shaded.org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
	at org.apache.kudu.shaded.org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
	at org.apache.kudu.shaded.org.jboss.netty.handler.codec.oneone.OneToOneDecoder.handleUpstream(OneToOneDecoder.java:60)
	at org.apache.kudu.shaded.org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
	at org.apache.kudu.shaded.org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
	at org.apache.kudu.shaded.org.jboss.netty.handler.codec.frame.FrameDecoder.cleanup(FrameDecoder.java:493)
	at org.apache.kudu.shaded.org.jboss.netty.handler.codec.frame.FrameDecoder.channelClosed(FrameDecoder.java:371)
	at org.apache.kudu.shaded.org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:88)
	at org.apache.kudu.shaded.org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
	at org.apache.kudu.shaded.org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:559)
	at org.apache.kudu.shaded.org.jboss.netty.channel.Channels.fireChannelClosed(Channels.java:468)
	at org.apache.kudu.shaded.org.jboss.netty.channel.Channels$6.run(Channels.java:457)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.ChannelRunnableWrapper.run(ChannelRunnableWrapper.java:40)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.AbstractNioSelector.processTaskQueue(AbstractNioSelector.java:391)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:315)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
	at org.apache.kudu.shaded.org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
	at org.apache.kudu.shaded.org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
[New I/O boss #17] ERROR org.apache.kudu.client.Connection - [peer master-localhost:7051(localhost:7051)] unexpected exception from downstream on [id: 0xf9759051]
java.net.ConnectException: Connection refused: localhost/127.0.0.1:7051
	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.NioClientBoss.connect(NioClientBoss.java:152)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.NioClientBoss.processSelectedKeys(NioClientBoss.java:105)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.NioClientBoss.process(NioClientBoss.java:79)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:337)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.NioClientBoss.run(NioClientBoss.java:42)
	at org.apache.kudu.shaded.org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
	at org.apache.kudu.shaded.org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
[New I/O worker #12] WARN org.apache.kudu.client.ConnectToCluster - Unable to find the leader master localhost:7051; will retry

... repeats with exponential backoff

After the patch
--------------
[New I/O boss #17] INFO org.apache.kudu.client.Connection - Failed to connect to peer master-localhost:7051(localhost:7051): Connection refused: localhost/127.0.0.1:7051
[New I/O worker #1] INFO org.apache.kudu.client.ConnectToCluster - Unable to connect to master localhost:7051: Connection refused: localhost/127.0.0.1:7051
[New I/O worker #1] WARN org.apache.kudu.client.ConnectToCluster - Unable to find the leader master localhost:7051; will retry

... repeats with exponential backoff

Case 2: Tserver is down
============================================================

Before the patch
----------------
[New I/O worker #11] INFO org.apache.kudu.client.AsyncKuduClient - Removing server fc9f6ab955cc47a8ab3653d0170305b0 from this tablet's cache 9da164fbcd93404ea8e38e9491eb3fa8
[New I/O boss #17] ERROR org.apache.kudu.client.Connection - [peer fc9f6ab955cc47a8ab3653d0170305b0(todd-laptop:7050)] unexpected exception from downstream on [id: 0x270e3a82]
java.net.ConnectException: Connection refused: todd-laptop/127.0.1.1:7050
	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.NioClientBoss.connect(NioClientBoss.java:152)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.NioClientBoss.processSelectedKeys(NioClientBoss.java:105)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.NioClientBoss.process(NioClientBoss.java:79)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:337)
	at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.NioClientBoss.run(NioClientBoss.java:42)
	at org.apache.kudu.shaded.org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
	at org.apache.kudu.shaded.org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)

... repeats with exponential backoff

After the patch
---------------
[New I/O boss #17] INFO org.apache.kudu.client.Connection - Failed to connect to peer fc9f6ab955cc47a8ab3653d0170305b0(todd-laptop:7050): Connection refused: todd-laptop/127.0.1.1:7050
[New I/O worker #15] INFO org.apache.kudu.client.AsyncKuduClient - Invalidating location fc9f6ab955cc47a8ab3653d0170305b0(todd-laptop:7050) for tablet 478ddbaafb5b494ea0de8e2d0ed45a00: Connection refused: todd-laptop/127.0.1.1:7050

... repeats with exponential backoff

Case 3: A tablet is bad
============================================================
In this case I manually delete a non-replicated tablet that is being written to
using 'kudu remote_replica delete'. This is unrecoverable since there is
no other replica.

Before the patch
-----------------
[New I/O worker #10] INFO org.apache.kudu.client.AsyncKuduClient - Removing server fc9f6ab955cc47a8ab3653d0170305b0 from this tablet's cache a633f4a0c14b4404a8ae1f825b378867

... repeats with exponential backoff

After the patch
----------------
[New I/O worker #9] INFO org.apache.kudu.client.AsyncKuduClient - Invalidating location 36622c46b25f4da9ada43f8591728053(todd-laptop:7050) for tablet c0b9488597e8447595ad0ee0a3378f95: Tablet not RUNNING: STOPPED

... repeats with exponential backoff

Change-Id: I4b8be871693fecc1ee46a4e238dd2ed8f0730d4b
Reviewed-on: http://gerrit.cloudera.org:8080/9644
Reviewed-by: Grant Henke <gr...@gmail.com>
Tested-by: Grant Henke <gr...@gmail.com>
Reviewed-on: http://gerrit.cloudera.org:8080/9827
Reviewed-by: Grant Henke <gr...@apache.org>
Tested-by: Will Berkeley <wd...@gmail.com>
---
M java/kudu-client/src/main/java/org/apache/kudu/client/AsyncKuduClient.java
M java/kudu-client/src/main/java/org/apache/kudu/client/ConnectToCluster.java
M java/kudu-client/src/main/java/org/apache/kudu/client/Connection.java
M java/kudu-client/src/test/java/org/apache/kudu/client/TestClientFailoverSupport.java
M java/kudu-client/src/test/java/org/apache/kudu/client/TestKuduClient.java
5 files changed, 78 insertions(+), 7 deletions(-)

Approvals:
  Grant Henke: Looks good to me, approved
  Will Berkeley: Verified

-- 
To view, visit http://gerrit.cloudera.org:8080/9827
To unsubscribe, visit http://gerrit.cloudera.org:8080/settings

Gerrit-Project: kudu
Gerrit-Branch: branch-1.6.x
Gerrit-MessageType: merged
Gerrit-Change-Id: I4b8be871693fecc1ee46a4e238dd2ed8f0730d4b
Gerrit-Change-Number: 9827
Gerrit-PatchSet: 3
Gerrit-Owner: Will Berkeley <wd...@gmail.com>
Gerrit-Reviewer: Grant Henke <gr...@apache.org>
Gerrit-Reviewer: Kudu Jenkins
Gerrit-Reviewer: Todd Lipcon <to...@apache.org>
Gerrit-Reviewer: Will Berkeley <wd...@gmail.com>

[kudu-CR](branch-1.6.x) java: reduce scary exception spew and improve logging

Posted by "Will Berkeley (Code Review)" <ge...@cloudera.org>.
Will Berkeley has posted comments on this change. ( http://gerrit.cloudera.org:8080/9827 )

Change subject: java: reduce scary exception spew and improve logging
......................................................................


Patch Set 1: Verified+1

Unrelated C++ flake.


-- 
To view, visit http://gerrit.cloudera.org:8080/9827
To unsubscribe, visit http://gerrit.cloudera.org:8080/settings

Gerrit-Project: kudu
Gerrit-Branch: branch-1.6.x
Gerrit-MessageType: comment
Gerrit-Change-Id: I4b8be871693fecc1ee46a4e238dd2ed8f0730d4b
Gerrit-Change-Number: 9827
Gerrit-PatchSet: 1
Gerrit-Owner: Will Berkeley <wd...@gmail.com>
Gerrit-Reviewer: Grant Henke <gr...@apache.org>
Gerrit-Reviewer: Todd Lipcon <to...@apache.org>
Gerrit-Reviewer: Will Berkeley <wd...@gmail.com>
Gerrit-Comment-Date: Wed, 28 Mar 2018 00:35:56 +0000
Gerrit-HasComments: No

[kudu-CR](branch-1.6.x) java: reduce scary exception spew and improve logging

Posted by "Grant Henke (Code Review)" <ge...@cloudera.org>.
Grant Henke has posted comments on this change. ( http://gerrit.cloudera.org:8080/9827 )

Change subject: java: reduce scary exception spew and improve logging
......................................................................


Patch Set 1: Code-Review+2


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Gerrit-Project: kudu
Gerrit-Branch: branch-1.6.x
Gerrit-MessageType: comment
Gerrit-Change-Id: I4b8be871693fecc1ee46a4e238dd2ed8f0730d4b
Gerrit-Change-Number: 9827
Gerrit-PatchSet: 1
Gerrit-Owner: Will Berkeley <wd...@gmail.com>
Gerrit-Reviewer: Grant Henke <gr...@apache.org>
Gerrit-Reviewer: Kudu Jenkins
Gerrit-Reviewer: Todd Lipcon <to...@apache.org>
Gerrit-Comment-Date: Tue, 27 Mar 2018 21:22:57 +0000
Gerrit-HasComments: No

[kudu-CR](branch-1.6.x) java: reduce scary exception spew and improve logging

Posted by "Will Berkeley (Code Review)" <ge...@cloudera.org>.
Will Berkeley has removed Kudu Jenkins from this change.  ( http://gerrit.cloudera.org:8080/9827 )

Change subject: java: reduce scary exception spew and improve logging
......................................................................


Removed reviewer Kudu Jenkins with the following votes:

* Verified-1 by Kudu Jenkins (120)
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To view, visit http://gerrit.cloudera.org:8080/9827
To unsubscribe, visit http://gerrit.cloudera.org:8080/settings

Gerrit-Project: kudu
Gerrit-Branch: branch-1.6.x
Gerrit-MessageType: deleteReviewer
Gerrit-Change-Id: I4b8be871693fecc1ee46a4e238dd2ed8f0730d4b
Gerrit-Change-Number: 9827
Gerrit-PatchSet: 1
Gerrit-Owner: Will Berkeley <wd...@gmail.com>
Gerrit-Reviewer: Grant Henke <gr...@apache.org>
Gerrit-Reviewer: Todd Lipcon <to...@apache.org>