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HDFS-10526: libhdfs++: Add connect timeouts to async_connect calls. Contributed by Bob Hansen.

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This commit is contained in:
Bob Hansen 2016-06-20 15:37:14 -04:00 committed by James Clampffer
parent de6fce7817
commit 2616fe2025
11 changed files with 84 additions and 18 deletions
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7
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/include/hdfspp/options.h
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@ -33,6 +33,13 @@ struct Options {
int rpc_timeout;
static const int kDefaultRpcTimeout = 30000;
/**
* Time to wait for an RPC connection before failing
* Default: 30000
**/
int rpc_connect_timeout;
static const int kDefaultRpcConnectTimeout = 30000;
/**
* Maximum number of retries for RPC operations
**/

3
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/common/hdfs_configuration.cc
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@ -45,11 +45,12 @@ Options HdfsConfiguration::GetOptions() {
Options result;
OptionalSet(result.rpc_timeout, GetInt(kDfsClientSocketTimeoutKey));
OptionalSet(result.rpc_connect_timeout, GetInt(kIpcClientConnectTimeoutKey));
OptionalSet(result.max_rpc_retries, GetInt(kIpcClientConnectMaxRetriesKey));
OptionalSet(result.rpc_retry_delay_ms, GetInt(kIpcClientConnectRetryIntervalKey));
OptionalSet(result.defaultFS, GetUri(kFsDefaultFsKey));
optional<std::string> authentication_value = Get(kHadoopSecurityAuthentication);
optional<std::string> authentication_value = Get(kHadoopSecurityAuthenticationKey);
if (authentication_value ) {
std::string fixed_case_value = fixCase(authentication_value.value());
if (fixed_case_value == fixCase(kHadoopSecurityAuthentication_kerberos))

3
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/common/hdfs_configuration.h
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@ -39,9 +39,10 @@ class HdfsConfiguration : public Configuration {
// Keys to look for in the configuration file
static constexpr const char * kFsDefaultFsKey = "fs.defaultFS";
static constexpr const char * kDfsClientSocketTimeoutKey = "dfs.client.socket-timeout";
static constexpr const char * kIpcClientConnectTimeoutKey = "ipc.client.connect.timeout";
static constexpr const char * kIpcClientConnectMaxRetriesKey = "ipc.client.connect.max.retries";
static constexpr const char * kIpcClientConnectRetryIntervalKey = "ipc.client.connect.retry.interval";
static constexpr const char * kHadoopSecurityAuthentication = "hadoop.security.authentication";
static constexpr const char * kHadoopSecurityAuthenticationKey = "hadoop.security.authentication";
static constexpr const char * kHadoopSecurityAuthentication_simple = "simple";
static constexpr const char * kHadoopSecurityAuthentication_kerberos = "kerberos";

6
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/common/logging.cc
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@ -136,6 +136,11 @@ LogMessage& LogMessage::operator<<(const std::string& str) {
return *this;
}
LogMessage& LogMessage::operator<<(const ::asio::ip::tcp::endpoint& endpoint) {
msg_buffer_ << endpoint;
return *this;
}
LogMessage& LogMessage::operator<<(const char *str) {
if(str)
msg_buffer_ << str;
@ -213,4 +218,3 @@ const char * LogMessage::component_string() const {
}
}

3
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/common/logging.h
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@ -26,6 +26,8 @@
#include <mutex>
#include <memory>
#include <asio/ip/tcp.hpp>
namespace hdfs {
/**
@ -177,6 +179,7 @@ class LogMessage {
LogMessage& operator<<(const std::string*);
LogMessage& operator<<(const std::string&);
LogMessage& operator<<(const ::asio::ip::tcp::endpoint& endpoint);
//convert to a string "true"/"false"
LogMessage& operator<<(bool);

3
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/common/options.cc
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@ -27,7 +27,8 @@ const int Options::kDefaultMaxRpcRetries;
const int Options::kDefaultRpcRetryDelayMs;
const unsigned int Options::kDefaultHostExclusionDuration;
Options::Options() : rpc_timeout(kDefaultRpcTimeout), max_rpc_retries(kDefaultMaxRpcRetries),
Options::Options() : rpc_timeout(kDefaultRpcTimeout), rpc_connect_timeout(kDefaultRpcConnectTimeout),
max_rpc_retries(kDefaultMaxRpcRetries),
rpc_retry_delay_ms(kDefaultRpcRetryDelayMs),
host_exclusion_duration(kDefaultHostExclusionDuration),
defaultFS(),

5
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/rpc/rpc_connection.cc
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@ -183,7 +183,7 @@ void RpcConnection::HandshakeComplete(const Status &s) {
LOG_TRACE(kRPC, << "RpcConnectionImpl::HandshakeComplete called");
if (s.ok()) {
if (connected_ == kConnecting) {
if (connected_ == kHandshaking) {
auto shared_this = shared_from_this();
connected_ = kAuthenticating;
@ -407,7 +407,7 @@ void RpcConnection::SendRpcRequests(const std::vector<std::shared_ptr<Request> >
else
auth_requests_.push_back(r);
}
if (connected_ == kConnected || connected_ == kAuthenticating) { // Dont flush if we're waiting or handshaking
if (connected_ == kConnected || connected_ == kHandshaking || connected_ == kAuthenticating) { // Dont flush if we're waiting or handshaking
FlushPendingRequests();
}
}
@ -494,6 +494,7 @@ std::string RpcConnection::ToString(ConnectedState connected) {
switch(connected) {
case kNotYetConnected: return "NotYetConnected";
case kConnecting: return "Connecting";
case kHandshaking: return "Handshaking";
case kAuthenticating: return "Authenticating";
case kConnected: return "Connected";
case kDisconnected: return "Disconnected";

55
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/rpc/rpc_connection.h
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@ -59,17 +59,20 @@ public:
private:
const Options options_;
::asio::ip::tcp::endpoint current_endpoint_;
std::vector<::asio::ip::tcp::endpoint> additional_endpoints_;
NextLayer next_layer_;
::asio::deadline_timer connect_timer_;
void ConnectComplete(const ::asio::error_code &ec);
void ConnectComplete(const ::asio::error_code &ec, const ::asio::ip::tcp::endpoint &remote);
};
template <class NextLayer>
RpcConnectionImpl<NextLayer>::RpcConnectionImpl(RpcEngine *engine)
: RpcConnection(engine),
options_(engine->options()),
next_layer_(engine->io_service()) {
next_layer_(engine->io_service()),
connect_timer_(engine->io_service()) {
LOG_TRACE(kRPC, << "RpcConnectionImpl::RpcConnectionImpl called");
}
@ -129,20 +132,43 @@ void RpcConnectionImpl<NextLayer>::ConnectAndFlush(
additional_endpoints_ = server;
::asio::ip::tcp::endpoint first_endpoint = additional_endpoints_.front();
additional_endpoints_.erase(additional_endpoints_.begin());
current_endpoint_ = first_endpoint;
auto shared_this = shared_from_this();
next_layer_.async_connect(first_endpoint, [shared_this, this](const ::asio::error_code &ec) {
ConnectComplete(ec);
next_layer_.async_connect(first_endpoint, [shared_this, this, first_endpoint](const ::asio::error_code &ec) {
ConnectComplete(ec, first_endpoint);
});
// Prompt the timer to timeout
auto weak_this = std::weak_ptr<RpcConnection>(shared_this);
connect_timer_.expires_from_now(
std::chrono::milliseconds(options_.rpc_connect_timeout));
connect_timer_.async_wait([shared_this, this, first_endpoint](const ::asio::error_code &ec) {
if (ec)
ConnectComplete(ec, first_endpoint);
else
ConnectComplete(make_error_code(asio::error::host_unreachable), first_endpoint);
});
}
template <class NextLayer>
void RpcConnectionImpl<NextLayer>::ConnectComplete(const ::asio::error_code &ec) {
void RpcConnectionImpl<NextLayer>::ConnectComplete(const ::asio::error_code &ec, const ::asio::ip::tcp::endpoint & remote) {
auto shared_this = RpcConnectionImpl<NextLayer>::shared_from_this();
std::lock_guard<std::mutex> state_lock(connection_state_lock_);
connect_timer_.cancel();
LOG_TRACE(kRPC, << "RpcConnectionImpl::ConnectComplete called");
// Could be an old async connect returning a result after we've moved on
if (remote != current_endpoint_) {
LOG_DEBUG(kRPC, << "Got ConnectComplete for " << remote << " but current_endpoint_ is " << current_endpoint_);
return;
}
if (connected_ != kConnecting) {
LOG_DEBUG(kRPC, << "Got ConnectComplete but current state is " << connected_);;
return;
}
Status status = ToStatus(ec);
if(event_handlers_) {
auto event_resp = event_handlers_->call(FS_NN_CONNECT_EVENT, cluster_name_.c_str(), 0);
@ -159,6 +185,7 @@ void RpcConnectionImpl<NextLayer>::ConnectComplete(const ::asio::error_code &ec)
HandshakeComplete(s);
});
} else {
LOG_DEBUG(kRPC, << "Rpc connection failed; err=" << status.ToString());;
std::string err = SafeDisconnect(get_asio_socket_ptr(&next_layer_));
if(!err.empty()) {
LOG_INFO(kRPC, << "Rpc connection failed to connect to endpoint, error closing connection: " << err);
@ -169,10 +196,19 @@ void RpcConnectionImpl<NextLayer>::ConnectComplete(const ::asio::error_code &ec)
// hit one
::asio::ip::tcp::endpoint next_endpoint = additional_endpoints_.front();
additional_endpoints_.erase(additional_endpoints_.begin());
current_endpoint_ = next_endpoint;
next_layer_.async_connect(next_endpoint, [shared_this, this](const ::asio::error_code &ec) {
ConnectComplete(ec);
next_layer_.async_connect(next_endpoint, [shared_this, this, next_endpoint](const ::asio::error_code &ec) {
ConnectComplete(ec, next_endpoint);
});
connect_timer_.expires_from_now(
std::chrono::milliseconds(options_.rpc_connect_timeout));
connect_timer_.async_wait([shared_this, this, next_endpoint](const ::asio::error_code &ec) {
if (ec)
ConnectComplete(ec, next_endpoint);
else
ConnectComplete(make_error_code(asio::error::host_unreachable), next_endpoint);
});
} else {
CommsError(status);
}
@ -184,6 +220,7 @@ void RpcConnectionImpl<NextLayer>::SendHandshake(RpcCallback &handler) {
assert(lock_held(connection_state_lock_)); // Must be holding lock before calling
LOG_TRACE(kRPC, << "RpcConnectionImpl::SendHandshake called");
connected_ = kHandshaking;
auto shared_this = shared_from_this();
auto handshake_packet = PrepareHandshakePacket();
@ -250,6 +287,8 @@ void RpcConnectionImpl<NextLayer>::FlushPendingRequests() {
return;
case kConnecting:
return;
case kHandshaking:
return;
case kAuthenticating:
if (auth_requests_.empty()) {
return;
@ -379,7 +418,7 @@ void RpcConnectionImpl<NextLayer>::Disconnect() {
LOG_INFO(kRPC, << "RpcConnectionImpl::Disconnect called");
request_over_the_wire_.reset();
if (connected_ == kConnecting || connected_ == kAuthenticating || connected_ == kConnected) {
if (connected_ == kConnecting || connected_ == kHandshaking || connected_ == kAuthenticating || connected_ == kConnected) {
// Don't print out errors, we were expecting a disconnect here
SafeDisconnect(get_asio_socket_ptr(&next_layer_));
}

2
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/rpc/rpc_engine.cc
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@ -197,7 +197,7 @@ void RpcEngine::RpcCommsError(
if (head_action->delayMillis > 0) {
auto weak_conn = std::weak_ptr<RpcConnection>(conn_);
retry_timer.expires_from_now(
std::chrono::milliseconds(options_.rpc_retry_delay_ms));
std::chrono::milliseconds(head_action->delayMillis));
retry_timer.async_wait([this, weak_conn](asio::error_code ec) {
auto strong_conn = weak_conn.lock();
if ( (!ec) && (strong_conn) ) {

1
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/rpc/rpc_engine.h
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@ -207,6 +207,7 @@ class RpcConnection : public std::enable_shared_from_this<RpcConnection> {
enum ConnectedState {
kNotYetConnected,
kConnecting,
kHandshaking,
kAuthenticating,
kConnected,
kDisconnected

14
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/tests/hdfs_configuration_test.cc
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@ -41,17 +41,25 @@ TEST(HdfsConfigurationTest, TestSetOptions)
// Completely empty stream
{
std::stringstream stream;
simpleConfigStream(stream, HdfsConfiguration::kDfsClientSocketTimeoutKey, 100,
HdfsConfiguration::kIpcClientConnectMaxRetriesKey, 101,
HdfsConfiguration::kIpcClientConnectRetryIntervalKey, 102);
simpleConfigStream(stream,
HdfsConfiguration::kFsDefaultFsKey, "/FDFK",
HdfsConfiguration::kDfsClientSocketTimeoutKey, 100,
HdfsConfiguration::kIpcClientConnectMaxRetriesKey, 101,
HdfsConfiguration::kIpcClientConnectRetryIntervalKey, 102,
HdfsConfiguration::kIpcClientConnectTimeoutKey, 103,
HdfsConfiguration::kHadoopSecurityAuthenticationKey, HdfsConfiguration::kHadoopSecurityAuthentication_kerberos
);
optional<HdfsConfiguration> config = ConfigurationLoader().Load<HdfsConfiguration>(stream.str());
EXPECT_TRUE(config && "Read stream");
Options options = config->GetOptions();
EXPECT_EQ("/FDFK", options.defaultFS.str());
EXPECT_EQ(100, options.rpc_timeout);
EXPECT_EQ(101, options.max_rpc_retries);
EXPECT_EQ(102, options.rpc_retry_delay_ms);
EXPECT_EQ(103, options.rpc_connect_timeout);
EXPECT_EQ(Options::kKerberos, options.authentication);
}
}