[FAB-7522] Customize private data push ack timeout

This change set adds a key in core.yaml that customizes
the maximum time to wait for an ack when peers are pushing private
data at endorsement time.

Change-Id: I1c62a7c1d3ad67c7e58b128d3f453b3550c45143
Signed-off-by: yacovm <yacovm@il.ibm.com>

Author: yacovm

gossip/privdata/distributor.go

@@ -10,7 +10,6 @@ import (
 	"fmt"
 	"sync"
 	"sync/atomic"
-	"time"
 
 	"github.com/hyperledger/fabric/core/common/privdata"
 	"github.com/hyperledger/fabric/gossip/api"
@@ -23,6 +22,7 @@ import (
 	proto "github.com/hyperledger/fabric/protos/gossip"
 	"github.com/hyperledger/fabric/protos/ledger/rwset"
 	"github.com/pkg/errors"
+	"github.com/spf13/viper"
 )
 
 // gossipAdapter an adapter for API's required from gossip module
@@ -125,7 +125,7 @@ func (d *distributorImpl) disseminationPlanForMsg(colAP privdata.CollectionAcces
 	}
 
 	sc := gossip2.SendCriteria{
-		Timeout:  time.Second,
+		Timeout:  viper.GetDuration("peer.gossip.pvtData.pushAckTimeout"),
 		Channel:  gossipCommon.ChainID(d.chainID),
 		MaxPeers: colAP.MaximumPeerCount(),
 		MinAck:   colAP.RequiredPeerCount(),

sampleconfig/core.yaml

@@ -225,6 +225,9 @@ peer:
             # Private data is purged from the transient store when blocks with sequences that are multiples
             # of transientstoreMaxBlockRetention are committed.
             transientstoreMaxBlockRetention: 1000
+            # pushAckTimeout is the maximum time to wait for an acknowledgement from each peer
+            # at private data push at endorsement time.
+            pushAckTimeout: 3s
 
     # EventHub related configuration
     events: