Guys, 

I am curious what these "Squashed commit..." thing means? Are these about
Squashing commits on master or else... Also, why would you need a special
commit about other commits squashing...? Really confused...

Thanks for the clarification
  Cos

On Fri, Jul 31, 2015 at 10:35AM, [email protected] wrote:
> Repository: incubator-ignite
> Updated Branches:
>   refs/heads/master 7ed4d15f1 -> 44072f806
> 
> 
> Squashed commit of the following:
> 
> commit f55a17f71ec97513a6968b1ea3c359bc6238cc5e
> Author: Yakov Zhdanov <[email protected]>
> Date:   Fri Jul 31 13:32:32 2015 +0300
> 
>     review
> 
> commit 58ca345f622dbadfba7ef2d3dce850c4baa1f319
> Merge: 5f921f6 7ed4d15
> Author: Yakov Zhdanov <[email protected]>
> Date:   Fri Jul 31 13:24:51 2015 +0300
> 
>     Merge branches 'ignite-752-2' and 'master' of 
> https://git-wip-us.apache.org/repos/asf/incubator-ignite into ignite-752-2
> 
> commit 5f921f62dd6563a88b2ecdde92a2b2ee8218ec95
> Author: Denis Magda <[email protected]>
> Date:   Wed Jul 29 10:40:44 2015 +0300
> 
>     ignite-752-2: added info on the lowest failure detection timeout to the 
> documentation
> 
> commit 55f0eb56967d2cc9bdf62c3fb665521a59ddaf33
> Author: Denis Magda <[email protected]>
> Date:   Wed Jul 29 09:15:29 2015 +0300
> 
>     ignite-752-2: supported connection check frequency even for cases when 
> failure timeout is ignored; performance optimizations
> 
> 
> Project: http://git-wip-us.apache.org/repos/asf/incubator-ignite/repo
> Commit: 
> http://git-wip-us.apache.org/repos/asf/incubator-ignite/commit/44072f80
> Tree: http://git-wip-us.apache.org/repos/asf/incubator-ignite/tree/44072f80
> Diff: http://git-wip-us.apache.org/repos/asf/incubator-ignite/diff/44072f80
> 
> Branch: refs/heads/master
> Commit: 44072f806d8d14d716475a3665d0afdf004c6db2
> Parents: 7ed4d15
> Author: Denis Magda <[email protected]>
> Authored: Fri Jul 31 13:35:46 2015 +0300
> Committer: Yakov Zhdanov <[email protected]>
> Committed: Fri Jul 31 13:35:46 2015 +0300
> 
> ----------------------------------------------------------------------
>  .../ignite/spi/discovery/tcp/ServerImpl.java    | 42 +++++++++++---------
>  .../spi/discovery/tcp/TcpDiscoverySpi.java      |  2 +-
>  2 files changed, 24 insertions(+), 20 deletions(-)
> ----------------------------------------------------------------------
> 
> 
> http://git-wip-us.apache.org/repos/asf/incubator-ignite/blob/44072f80/modules/core/src/main/java/org/apache/ignite/spi/discovery/tcp/ServerImpl.java
> ----------------------------------------------------------------------
> diff --git 
> a/modules/core/src/main/java/org/apache/ignite/spi/discovery/tcp/ServerImpl.java
>  
> b/modules/core/src/main/java/org/apache/ignite/spi/discovery/tcp/ServerImpl.java
> index 547347c..47ba8e6 100644
> --- 
> a/modules/core/src/main/java/org/apache/ignite/spi/discovery/tcp/ServerImpl.java
> +++ 
> b/modules/core/src/main/java/org/apache/ignite/spi/discovery/tcp/ServerImpl.java
> @@ -1787,6 +1787,9 @@ class ServerImpl extends TcpDiscoveryImpl {
>          /** Connection check frequency. */
>          private long connCheckFreq;
>  
> +        /** Connection check threshold. */
> +        private long connCheckThreshold;
> +
>          /**
>           */
>          protected RingMessageWorker() {
> @@ -1799,19 +1802,22 @@ class ServerImpl extends TcpDiscoveryImpl {
>           * Initializes connection check frequency. Used only when failure 
> detection timeout is enabled.
>           */
>          private void initConnectionCheckFrequency() {
> -            if (spi.failureDetectionTimeoutEnabled()) {
> -                for (int i = 3; i > 0; i--) {
> -                    connCheckFreq = spi.failureDetectionTimeout() / i;
> -
> -                    if (connCheckFreq > 0)
> -                        break;
> -                }
> +            if (spi.failureDetectionTimeoutEnabled())
> +                connCheckThreshold = spi.failureDetectionTimeout();
> +            else
> +                connCheckThreshold = Math.min(spi.getSocketTimeout(), 
> spi.getHeartbeatFrequency());
>  
> -                assert connCheckFreq > 0;
> +            for (int i = 3; i > 0; i--) {
> +                connCheckFreq = connCheckThreshold / i;
>  
> -                if (log.isDebugEnabled())
> -                    log.debug("Connection check frequency is calculated: " + 
> connCheckFreq);
> +                if (connCheckFreq > 10)
> +                    break;
>              }
> +
> +            assert connCheckFreq > 0;
> +
> +            if (log.isDebugEnabled())
> +                log.debug("Connection check frequency is calculated: " + 
> connCheckFreq);
>          }
>  
>          /**
> @@ -2306,9 +2312,9 @@ class ServerImpl extends TcpDiscoveryImpl {
>  
>                              // If node existed on connection initialization 
> we should check
>                              // whether it has not gone yet.
> -                            if (nextNodeExists && pingNode(next))
> -                                U.error(log, "Failed to send message to next 
> node [msg=" + msg +
> -                                    ", next=" + next + ']', err);
> +                            if (nextNodeExists)
> +                                U.warn(log, "Failed to send message to next 
> node [msg=" + msg + ", next=" + next +
> +                                    ", errMsg=" + (err != null ? 
> err.getMessage() : "N/A") + ']');
>                              else if (log.isDebugEnabled())
>                                  log.debug("Failed to send message to next 
> node [msg=" + msg + ", next=" + next +
>                                      ", errMsg=" + (err != null ? 
> err.getMessage() : "N/A") + ']');
> @@ -4025,7 +4031,7 @@ class ServerImpl extends TcpDiscoveryImpl {
>  
>          /**
>           * Check the last time a heartbeat message received. If the time is 
> bigger than {@code hbCheckTimeout} than
> -         * {@link TcpDiscoveryStatusCheckMessage} is sent accros the ring.
> +         * {@link TcpDiscoveryStatusCheckMessage} is sent across the ring.
>           */
>          private void checkHeartbeatsReceiving() {
>              if (lastTimeStatusMsgSent < locNode.lastUpdateTime())
> @@ -4045,11 +4051,9 @@ class ServerImpl extends TcpDiscoveryImpl {
>           * Check connection aliveness status.
>           */
>          private void checkConnection() {
> -            if (!spi.failureDetectionTimeoutEnabled())
> -                return;
> -
> -            if (!failureThresholdReached && U.currentTimeMillis() - 
> locNode.lastDataReceivedTime()
> -                >= spi.failureDetectionTimeout() && ring.hasRemoteNodes() && 
> spiStateCopy() == CONNECTED) {
> +            if (spi.failureDetectionTimeoutEnabled() && 
> !failureThresholdReached &&
> +                U.currentTimeMillis() - locNode.lastDataReceivedTime() >= 
> connCheckThreshold &&
> +                ring.hasRemoteNodes() && spiStateCopy() == CONNECTED) {
>  
>                  log.info("Local node seems to be disconnected from topology 
> (failure detection timeout " +
>                      "is reached): [failureDetectionTimeout=" + 
> spi.failureDetectionTimeout() +
> 
> http://git-wip-us.apache.org/repos/asf/incubator-ignite/blob/44072f80/modules/core/src/main/java/org/apache/ignite/spi/discovery/tcp/TcpDiscoverySpi.java
> ----------------------------------------------------------------------
> diff --git 
> a/modules/core/src/main/java/org/apache/ignite/spi/discovery/tcp/TcpDiscoverySpi.java
>  
> b/modules/core/src/main/java/org/apache/ignite/spi/discovery/tcp/TcpDiscoverySpi.java
> index 09690dc..3216166 100644
> --- 
> a/modules/core/src/main/java/org/apache/ignite/spi/discovery/tcp/TcpDiscoverySpi.java
> +++ 
> b/modules/core/src/main/java/org/apache/ignite/spi/discovery/tcp/TcpDiscoverySpi.java
> @@ -74,7 +74,7 @@ import java.util.concurrent.atomic.*;
>   * {@link IgniteConfiguration#setFailureDetectionTimeout(long)}. This 
> failure timeout automatically controls the
>   * following parameters: {@link #getSocketTimeout()}, {@link 
> #getAckTimeout()}, {@link #getMaxAckTimeout()},
>   * {@link #getReconnectCount()}. If any of those parameters is set 
> explicitly, then the failure timeout setting will be
> - * ignored.
> + * ignored. As an example, for stable low-latency networks the failure 
> detection timeout may be set to ~120 ms.
>   * <p>
>   * If it's required to perform advanced settings of failure detection and
>   * {@link IgniteConfiguration#getFailureDetectionTimeout()} is unsuitable 
> then various {@code TcpDiscoverySpi}
> 

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