GridServer 5.1.3 Hotfix10 is now available. Here are the release notes:
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Affected Components for 5.1.3_hotfix10

The following components are updated by this hotfix:
Resin
Manager
Engine
Windows Daemon
.NET Services
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Closed Issues in 5.1.3_hotfix10 (This Release)

C++ Specific
GS-13212
CPP driver support added for VC14 (Visual Studio 2015).  To use VC14 and later
on Grid Server 5.x products, you must have MIT Kerberos for Windows installed
and in your path if you wish to use Kerberos authentication.  Kerberos binaries
are no longer bundled with the driver directly for VC14 and later.  VC10 and
earlier drivers are not affected.


Engine
GS-13127
When the 8.3 short filename convention is disabled, the grid-lib path set
incorrectly in the engine.  Changing to load grid-lib by absolute path when the
engine failed to load by java.library.path.


Manager
GS-13232
Currently, the protocol of input/output data transfer between the broker and
engine is not configurable. We had added “HTTPS Enabled for input/output" option
in the Admin->Security page to allow the user to select the protocol.

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To download this hotfix, login to the support portal and navigate to Downloads > Hotfixes > AvailableDownloads > Datasynapse > Gridserver > 5.1.3