diff --git a/CMakeLists.txt b/CMakeLists.txt
index a9577f28..e6c0948f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,40 @@
 cmake_minimum_required(VERSION 3.10)
 
+if(NOT CMAKE_CONFIGURATION_TYPES AND NOT CMAKE_BUILD_TYPE)
+   set(CMAKE_BUILD_TYPE RelWithDebInfo)
+endif(NOT CMAKE_CONFIGURATION_TYPES AND NOT CMAKE_BUILD_TYPE)
+
+if(CMAKE_BUILD_TYPE MATCHES RelWithDebInfo)
+    message("==> The configuration is ${CMAKE_BUILD_TYPE}. Debug info will be extracted into separate files.")
+
+    function (add_executable _name)
+        _add_executable(${ARGV})
+
+        if (TARGET ${_name})
+            add_custom_command(TARGET ${_name} POST_BUILD
+                COMMAND echo "$<TARGET_FILE_NAME:${_name}>: extracting debug info"
+                COMMAND ${CMAKE_COMMAND} -E chdir $<TARGET_FILE_DIR:${_name}> objcopy --only-keep-debug "$<TARGET_FILE_NAME:${_name}>" "$<TARGET_FILE_NAME:${_name}>.debug"
+                COMMAND ${CMAKE_COMMAND} -E chdir $<TARGET_FILE_DIR:${_name}> strip --strip-debug --strip-unneeded "$<TARGET_FILE_NAME:${_name}>"
+                COMMAND ${CMAKE_COMMAND} -E chdir $<TARGET_FILE_DIR:${_name}> objcopy --add-gnu-debuglink="$<TARGET_FILE_NAME:${_name}>.debug" "$<TARGET_FILE_NAME:${_name}>"
+            )
+        endif()
+    endfunction()
+
+    function (add_library _name _type)
+        _add_library(${ARGV})
+
+        if (TARGET ${_name} AND ${_type} STREQUAL SHARED)
+            add_custom_command(TARGET ${_name} POST_BUILD
+                COMMAND echo "$<TARGET_FILE_NAME:${_name}>: extracting debug info"
+                COMMAND ${CMAKE_COMMAND} -E chdir $<TARGET_FILE_DIR:${_name}> objcopy --only-keep-debug "$<TARGET_FILE_NAME:${_name}>" "$<TARGET_FILE_NAME:${_name}>.debug"
+                COMMAND ${CMAKE_COMMAND} -E chdir $<TARGET_FILE_DIR:${_name}> strip --strip-debug --strip-unneeded "$<TARGET_FILE_NAME:${_name}>"
+                COMMAND ${CMAKE_COMMAND} -E chdir $<TARGET_FILE_DIR:${_name}> objcopy --add-gnu-debuglink="$<TARGET_FILE_NAME:${_name}>.debug" "$<TARGET_FILE_NAME:${_name}>"
+            )
+        endif()
+    endfunction()
+
+endif(CMAKE_BUILD_TYPE MATCHES RelWithDebInfo)
+
 project(graft_server)
 
 option(OPT_BUILD_TESTS "Build tests." OFF)
diff --git a/data/config.ini b/data/config.ini
index 948d4978..99ff30ca 100644
--- a/data/config.ini
+++ b/data/config.ini
@@ -30,6 +30,7 @@ data-dir=
 stake-wallet-name=stake-wallet
 testnet=true
 stake-wallet-refresh-interval-ms=50000
+stake-wallet-refresh-interval-random-factor=0
 
 [ipfilter]
 ;; path to ipfilter rules file
diff --git a/include/lib/graft/common/utils.h b/include/lib/graft/common/utils.h
index 5c1e3f25..6fe439cc 100644
--- a/include/lib/graft/common/utils.h
+++ b/include/lib/graft/common/utils.h
@@ -12,8 +12,7 @@ std::string base64_encode(const std::string &data);
 template <typename T>
 T random_number(T startRange, T endRange)
 {
-    std::random_device rd;
-    std::mt19937 mt(rd());
+    static std::mt19937 mt(std::random_device{}());
     std::uniform_int_distribution<T> dist(startRange, endRange);
     return dist(mt);
 }
diff --git a/include/lib/graft/handler_api.h b/include/lib/graft/handler_api.h
index 6c9b0092..18cee9fe 100644
--- a/include/lib/graft/handler_api.h
+++ b/include/lib/graft/handler_api.h
@@ -13,8 +13,9 @@ class HandlerAPI
 public:
     virtual void sendUpstreamBlocking(Output& output, Input& input, std::string& err) = 0;
     virtual bool addPeriodicTask(const Router::Handler& h_worker,
-                                        std::chrono::milliseconds interval_ms,
-                                        std::chrono::milliseconds initial_interval_ms = std::chrono::milliseconds::max()) = 0;
+                                 std::chrono::milliseconds interval_ms,
+                                 std::chrono::milliseconds initial_interval_ms = std::chrono::milliseconds::max(),
+                                 double random_factor = 0) = 0;
     virtual request::system_info::Counter& runtimeSysInfo() = 0;
     virtual const ConfigOpts& configOpts() const = 0;
 };
diff --git a/include/lib/graft/task.h b/include/lib/graft/task.h
index 6fc8f1ad..65f438bb 100644
--- a/include/lib/graft/task.h
+++ b/include/lib/graft/task.h
@@ -153,19 +153,23 @@ class PeriodicTask : public BaseTask
     PeriodicTask(
             TaskManager& manager, const Router::Handler3& h3,
             std::chrono::milliseconds timeout_ms,
-            std::chrono::milliseconds initial_timeout_ms
+            std::chrono::milliseconds initial_timeout_ms,
+            double random_factor = 0
     ) : BaseTask(manager, Router::JobParams({Input(), Router::vars_t(), h3}))
       , m_timeout_ms(timeout_ms), m_initial_timeout_ms(initial_timeout_ms)
+      , m_random_factor(random_factor)
     {
     }
 
-    PeriodicTask(TaskManager& manager, const Router::Handler3& h3, std::chrono::milliseconds timeout_ms)
-        : PeriodicTask(manager, h3, timeout_ms, timeout_ms)
+    PeriodicTask(TaskManager& manager, const Router::Handler3& h3,
+                 std::chrono::milliseconds timeout_ms, double random_factor = 0)
+        : PeriodicTask(manager, h3, timeout_ms, timeout_ms, random_factor)
     {
     }
 
     std::chrono::milliseconds m_timeout_ms;
     std::chrono::milliseconds m_initial_timeout_ms;
+    double m_random_factor;
     bool m_initial_run {true};
 
 public:
@@ -199,7 +203,9 @@ class TaskManager : private HandlerAPI
 
     void sendUpstream(BaseTaskPtr bt);
     void addPeriodicTask(const Router::Handler3& h3,
-            std::chrono::milliseconds interval_ms, std::chrono::milliseconds initial_interval_ms = std::chrono::milliseconds::max());
+                         std::chrono::milliseconds interval_ms,
+                         std::chrono::milliseconds initial_interval_ms = std::chrono::milliseconds::max(),
+                         double random_factor = 0);
 
     ////getters
     virtual mg_mgr* getMgMgr()  = 0;
@@ -220,7 +226,8 @@ class TaskManager : private HandlerAPI
     virtual void sendUpstreamBlocking(Output& output, Input& input, std::string& err) override;
     virtual bool addPeriodicTask(const Router::Handler& h_worker,
                                  std::chrono::milliseconds interval_ms,
-                                 std::chrono::milliseconds initial_interval_ms = std::chrono::milliseconds::max()) override;
+                                 std::chrono::milliseconds initial_interval_ms = std::chrono::milliseconds::max(),
+                                 double random_factor = 0 ) override;
     virtual request::system_info::Counter& runtimeSysInfo() override;
     virtual const ConfigOpts& configOpts() const override;
 
@@ -282,7 +289,7 @@ class TaskManager : private HandlerAPI
     using PromiseItem = UpstreamTask::PromiseItem;
     using PromiseQueue = tp::MPMCBoundedQueue<PromiseItem>;
 
-    using PeridicTaskItem = std::tuple<Router::Handler3, std::chrono::milliseconds, std::chrono::milliseconds>;
+    using PeridicTaskItem = std::tuple<Router::Handler3, std::chrono::milliseconds, std::chrono::milliseconds, double>;
     using PeriodicTaskQueue = tp::MPMCBoundedQueue<PeridicTaskItem>;
 
     std::unique_ptr<PromiseQueue> m_promiseQueue;
diff --git a/include/rta/DaemonRpcClient.h b/include/rta/DaemonRpcClient.h
index c2fdfc03..82465cfd 100644
--- a/include/rta/DaemonRpcClient.h
+++ b/include/rta/DaemonRpcClient.h
@@ -45,7 +45,8 @@ namespace graft {
 class DaemonRpcClient
 {
 public:
-    DaemonRpcClient(const std::string &daemon_addr, const std::string &daemon_login, const std::string &daemon_pass);
+    DaemonRpcClient(const std::string &daemon_addr, const std::string &daemon_login, const std::string &daemon_pass,
+                    boost::shared_ptr<boost::asio::io_service> ios);
     virtual ~DaemonRpcClient();
     bool get_tx_from_pool(const std::string &hash_str, cryptonote::transaction &out_tx);
     bool get_tx(const std::string &hash_str, cryptonote::transaction &out_tx, uint64_t &block_num, bool &mined);
diff --git a/include/rta/fullsupernodelist.h b/include/rta/fullsupernodelist.h
index 2210745e..6712cefa 100644
--- a/include/rta/fullsupernodelist.h
+++ b/include/rta/fullsupernodelist.h
@@ -30,7 +30,7 @@ class FullSupernodeList
     static constexpr int64_t AUTH_SAMPLE_HASH_HEIGHT = 20; // block number for calculating auth sample should be calculated as current block height - AUTH_SAMPLE_HASH_HEIGHT;
     static constexpr int64_t ANNOUNCE_TTL_SECONDS = 60 * 60; // if more than ANNOUNCE_TTL_SECONDS passed from last annouce - supernode excluded from auth sample selection
 
-    FullSupernodeList(const std::string &daemon_address, bool testnet = false);
+    FullSupernodeList(const std::string &daemon_address, boost::shared_ptr<boost::asio::io_service> ios, bool testnet = false);
     ~FullSupernodeList();
     /**
      * @brief add - adds supernode object to a list and owns it. caller doesn't need to delete an object
diff --git a/include/rta/supernode.h b/include/rta/supernode.h
index 52985959..67084dc0 100644
--- a/include/rta/supernode.h
+++ b/include/rta/supernode.h
@@ -243,6 +243,8 @@ class Supernode
     bool busy() const;
 
 
+    static boost::shared_ptr<boost::asio::io_service> getIoService() { return  m_ioservice; }
+
 private:
     Supernode(bool testnet = false);
 
diff --git a/include/supernode/supernode.h b/include/supernode/supernode.h
index 09e2003a..64c038ca 100644
--- a/include/supernode/supernode.h
+++ b/include/supernode/supernode.h
@@ -13,6 +13,7 @@ class Supernode : public GraftServer
         std::string data_dir;
         std::string stake_wallet_name;
         size_t stake_wallet_refresh_interval_ms;
+        double stake_wallet_refresh_interval_random_factor;
         // runtime parameters.
         // path to watch-only wallets (supernodes)
         std::string watchonly_wallets_path;
diff --git a/modules/cryptonode b/modules/cryptonode
index d365c8e2..62df68b5 160000
--- a/modules/cryptonode
+++ b/modules/cryptonode
@@ -1 +1 @@
-Subproject commit d365c8e28a0449d1f3b2a19909788fc95833bb1b
+Subproject commit 62df68b5012e5a790036b9b1d49f166c4cc3c88a
diff --git a/src/lib/graft/task.cpp b/src/lib/graft/task.cpp
index 768c45b9..af83d445 100644
--- a/src/lib/graft/task.cpp
+++ b/src/lib/graft/task.cpp
@@ -6,6 +6,7 @@
 #include "lib/graft/handler_api.h"
 #include "lib/graft/expiring_list.h"
 #include "lib/graft/sys_info.h"
+#include "lib/graft/common/utils.h"
 
 #undef MONERO_DEFAULT_LOG_CATEGORY
 #define MONERO_DEFAULT_LOG_CATEGORY "supernode.task"
@@ -419,17 +420,18 @@ inline size_t TaskManager::next_pow2(size_t val)
 }
 
 bool TaskManager::addPeriodicTask(const Router::Handler& h_worker,
-                             std::chrono::milliseconds interval_ms,
-                             std::chrono::milliseconds initial_interval_ms)
+                                  std::chrono::milliseconds interval_ms,
+                                  std::chrono::milliseconds initial_interval_ms,
+                                  double random_factor)
 {
     if(io_thread)
     {//it is called from pre_action or post_action, and we can call requestAddPeriodicTask directly
-        addPeriodicTask({nullptr, h_worker, nullptr}, interval_ms, initial_interval_ms);
+        addPeriodicTask({nullptr, h_worker, nullptr}, interval_ms, initial_interval_ms, random_factor);
         return true;
     }
     else
     {
-        PeridicTaskItem item = std::make_tuple(Router::Handler3(nullptr, h_worker, nullptr), interval_ms, initial_interval_ms);
+        PeridicTaskItem item = std::make_tuple(Router::Handler3(nullptr, h_worker, nullptr), interval_ms, initial_interval_ms, random_factor);
         bool ok = m_periodicTaskQueue->push( std::move(item) );
         if(!ok) return false;
         notifyJobReady();
@@ -457,7 +459,8 @@ void TaskManager::checkPeriodicTaskIO()
         Router::Handler3& h3 = std::get<0>(pti);
         std::chrono::milliseconds& interval_ms = std::get<1>(pti);
         std::chrono::milliseconds& initial_interval_ms = std::get<2>(pti);
-        addPeriodicTask(h3, interval_ms, initial_interval_ms);
+        double& random_factor = std::get<3>(pti);
+        addPeriodicTask(h3, interval_ms, initial_interval_ms, random_factor);
     }
 }
 
@@ -816,11 +819,11 @@ void TaskManager::processOk(BaseTaskPtr bt)
 }
 
 void TaskManager::addPeriodicTask(
-        const Router::Handler3& h3, std::chrono::milliseconds interval_ms, std::chrono::milliseconds initial_interval_ms)
+        const Router::Handler3& h3, std::chrono::milliseconds interval_ms, std::chrono::milliseconds initial_interval_ms, double random_factor)
 {
     if(initial_interval_ms == std::chrono::milliseconds::max()) initial_interval_ms = interval_ms;
 
-    BaseTask* bt = BaseTask::Create<PeriodicTask>(*this, h3, interval_ms, initial_interval_ms).get();
+    BaseTask* bt = BaseTask::Create<PeriodicTask>(*this, h3, interval_ms, initial_interval_ms, random_factor).get();
     PeriodicTask* pt = dynamic_cast<PeriodicTask*>(bt);
     assert(pt);
     schedule(pt);
@@ -976,9 +979,15 @@ void PeriodicTask::finalize()
 
 std::chrono::milliseconds PeriodicTask::getTimeout()
 {
-    auto ret = (m_initial_run) ? m_initial_timeout_ms : m_timeout_ms;
-    m_initial_run = false;
-    return ret;
+    if(m_initial_run)
+    {
+        m_initial_run = false;
+        return m_initial_timeout_ms;
+    }
+    if(m_random_factor < 0.0001) return m_timeout_ms;
+    using i_type = decltype(m_timeout_ms.count());
+    i_type v = graft::utils::random_number(m_timeout_ms.count(), (i_type)(m_timeout_ms.count()*(1.0 + m_random_factor)));
+    return std::chrono::milliseconds(v);
 }
 
 ClientTask::ClientTask(ConnectionManager* connectionManager, mg_connection *client, Router::JobParams& prms)
diff --git a/src/rta/DaemonRpcClient.cpp b/src/rta/DaemonRpcClient.cpp
index ce7d1ba2..3f261f7c 100644
--- a/src/rta/DaemonRpcClient.cpp
+++ b/src/rta/DaemonRpcClient.cpp
@@ -38,8 +38,10 @@ using namespace std;
 
 namespace graft {
 
-DaemonRpcClient::DaemonRpcClient(const std::string &daemon_addr, const std::string &daemon_login, const std::string &daemon_pass)
-    :  m_rpc_timeout(std::chrono::seconds(30))
+DaemonRpcClient::DaemonRpcClient(const std::string &daemon_addr, const std::string &daemon_login, const std::string &daemon_pass,
+                                 boost::shared_ptr<boost::asio::io_service> ios)
+    : m_http_client(ios)
+    , m_rpc_timeout(std::chrono::seconds(30))
 {
 
     boost::shared_mutex mutex;
diff --git a/src/rta/fullsupernodelist.cpp b/src/rta/fullsupernodelist.cpp
index dc07624d..d233afb3 100644
--- a/src/rta/fullsupernodelist.cpp
+++ b/src/rta/fullsupernodelist.cpp
@@ -123,10 +123,10 @@ constexpr int32_t FullSupernodeList::TIERS, FullSupernodeList::ITEMS_PER_TIER, F
 constexpr int64_t FullSupernodeList::AUTH_SAMPLE_HASH_HEIGHT, FullSupernodeList::ANNOUNCE_TTL_SECONDS;
 #endif
 
-FullSupernodeList::FullSupernodeList(const string &daemon_address, bool testnet)
+FullSupernodeList::FullSupernodeList(const string &daemon_address, boost::shared_ptr<boost::asio::io_service> ios, bool testnet)
     : m_daemon_address(daemon_address)
     , m_testnet(testnet)
-    , m_rpc_client(daemon_address, "", "")
+    , m_rpc_client(daemon_address, "", "", ios)
     , m_tp(new utils::ThreadPool())
 {
     m_refresh_counter = 0;
diff --git a/src/supernode/supernode.cpp b/src/supernode/supernode.cpp
index fea1f5a8..52badce0 100644
--- a/src/supernode/supernode.cpp
+++ b/src/supernode/supernode.cpp
@@ -51,6 +51,7 @@ bool Supernode::initConfigOption(int argc, const char** argv, ConfigOpts& config
     m_configEx.stake_wallet_refresh_interval_ms = server_conf.get<size_t>("stake-wallet-refresh-interval-ms",
                                                                       consts::DEFAULT_STAKE_WALLET_REFRESH_INTERFAL_MS);
     m_configEx.testnet = server_conf.get<bool>("testnet", false);
+    m_configEx.stake_wallet_refresh_interval_random_factor = server_conf.get<double>("stake-wallet-refresh-interval-random-factor", 0);
     return res;
 }
 
@@ -102,7 +103,8 @@ void Supernode::prepareDataDir()
 
     // create fullsupernode list instance and put it into global context
     graft::FullSupernodeListPtr fsl = boost::make_shared<graft::FullSupernodeList>(
-                m_configEx.cryptonode_rpc_address, m_configEx.testnet);
+                m_configEx.cryptonode_rpc_address, graft::Supernode::getIoService(),
+                m_configEx.testnet);
 
     fsl->add(supernode);
 
@@ -137,7 +139,8 @@ void Supernode::startSupernodePeriodicTasks()
         getLooper().addPeriodicTask(
                     graft::Router::Handler3(nullptr, graft::supernode::request::sendAnnounce, nullptr),
                     std::chrono::milliseconds(m_configEx.stake_wallet_refresh_interval_ms),
-                    std::chrono::milliseconds(initial_interval_ms)
+                    std::chrono::milliseconds(initial_interval_ms),
+                    m_configEx.stake_wallet_refresh_interval_random_factor
                     );
     }
 }
diff --git a/src/version.h.in b/src/version.h.in
index 4f7b12cd..f5adea4b 100644
--- a/src/version.h.in
+++ b/src/version.h.in
@@ -1,4 +1,4 @@
 #define GRAFT_SUPERNODE_VERSION_TAG "@VERSIONTAG@"
-#define GRAFT_SUPERNODE_VERSION "0.4.1"
+#define GRAFT_SUPERNODE_VERSION "0.4.2"
 #define GRAFT_SUPERNODE_RELEASE_NAME ""
 #define GRAFT_SUPERNODE_VERSION_FULL GRAFT_SUPERNODE_VERSION "-" GRAFT_SUPERNODE_VERSION_TAG
diff --git a/test/graft_server_test.cpp b/test/graft_server_test.cpp
index 50983b5e..63e13124 100644
--- a/test/graft_server_test.cpp
+++ b/test/graft_server_test.cpp
@@ -1256,7 +1256,7 @@ TEST_F(GraftServerTest, genericCallback)
         case graft::Status::None:
         {
             //find webhook endpoint
-            auto it = std::find_if(input.headers.begin(), input.headers.end(), [](auto& v)->bool { v.first == "X-Callback"; } );
+            auto it = std::find_if(input.headers.begin(), input.headers.end(), [](auto& v)->bool { return v.first == "X-Callback"; } );
             assert(it != input.headers.end());
             std::string path = it->second; //"http://0.0.0.0:port/callback/<uuid>"
 
diff --git a/test/sys_info.cpp b/test/sys_info.cpp
index 3b18a41d..845a10bf 100644
--- a/test/sys_info.cpp
+++ b/test/sys_info.cpp
@@ -151,8 +151,9 @@ class HandlerAPIImpl : public graft::HandlerAPI
 public:
     virtual void sendUpstreamBlocking(Output& output, Input& input, std::string& err) override { }
     virtual bool addPeriodicTask(const Router::Handler& h_worker,
-                                        std::chrono::milliseconds interval_ms,
-                                 std::chrono::milliseconds initial_interval_ms = std::chrono::milliseconds::max()) override { }
+                                 std::chrono::milliseconds interval_ms,
+                                 std::chrono::milliseconds initial_interval_ms = std::chrono::milliseconds::max(),
+                                 double random_factor = 0) override { }
     virtual graft::request::system_info::Counter& runtimeSysInfo() override
     {
         return m_sic;