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HDFS-11014: libhdfs++: Make connection to HA clusters faster. Contributed by James Clampffer.

This commit is contained in:
James 2016-10-17 11:57:45 -04:00 committed by James Clampffer
parent 6dd47cae86
commit 59a3926946
3 changed files with 8 additions and 3 deletions
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2
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/include/hdfspp/options.h
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@ -96,7 +96,7 @@ struct Options {
* Client failover attempts before failover gives up * Client failover attempts before failover gives up
**/ **/
int failover_max_retries; int failover_max_retries;
static const unsigned int kDefaultFailoverMaxRetries = 15; static const unsigned int kDefaultFailoverMaxRetries = 4;
/** /**
* Client failover attempts before failover gives up if server * Client failover attempts before failover gives up if server

7
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/common/retry_policy.cc
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@ -60,7 +60,12 @@ RetryAction FixedDelayWithFailover::ShouldRetry(const Status &s, uint64_t retrie
{ {
// Try connecting to another NN in case this one keeps timing out // Try connecting to another NN in case this one keeps timing out
// Can add the backoff wait specified by dfs.client.failover.sleep.base.millis here // Can add the backoff wait specified by dfs.client.failover.sleep.base.millis here
return RetryAction::failover(delay_); if(failovers == 0) {
// No delay on first failover if it looks like the NN was bad.
return RetryAction::failover(0);
} else {
return RetryAction::failover(delay_);
}
} }
if(retries < max_retries_ && failovers < max_failover_retries_) { if(retries < max_retries_ && failovers < max_failover_retries_) {

2
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/rpc/rpc_engine.cc
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@ -365,7 +365,7 @@ void RpcEngine::RpcCommsError(
ResolvedNamenodeInfo new_active_nn_info = ResolvedNamenodeInfo new_active_nn_info =
ha_persisted_info_->GetFailoverAndUpdate(last_endpoints_[0]/*reverse lookup*/); ha_persisted_info_->GetFailoverAndUpdate(last_endpoints_[0]/*reverse lookup*/);
LOG_INFO(kRPC, << "Going to try connecting to alternate Datanode: " << new_active_nn_info.uri.str()); LOG_INFO(kRPC, << "Going to try connecting to alternate Namenode: " << new_active_nn_info.uri.str());
if(ha_persisted_info_->is_resolved()) { if(ha_persisted_info_->is_resolved()) {
last_endpoints_ = new_active_nn_info.endpoints; last_endpoints_ = new_active_nn_info.endpoints;