fix bad MEMORY_LOG when ServerGTimer hang

deps/oblib/src/lib/alloc/ob_malloc_allocator.cpp

@@ -509,7 +509,7 @@ void ObMallocAllocator::print_tenant_memory_usage(uint64_t tenant_id) const
           ObPageManagerCenter::get_instance().print_tenant_stat(tenant_id, buf, BUFLEN, ctx_pos);
         }
         buf[std::min(ctx_pos, BUFLEN - 1)] = '\0';
-
+        allow_next_syslog();
         _LOG_INFO("[MEMORY] tenant: %lu, limit: %'lu hold: %'lu rpc_hold: %'lu cache_hold: %'lu "
                   "cache_used: %'lu cache_item_count: %'lu \n%s",
             tenant_id,

deps/oblib/src/lib/alloc/ob_tenant_ctx_allocator.cpp

@@ -23,7 +23,6 @@
 
 using namespace oceanbase::lib;
 using namespace oceanbase::common;
-
 void *ObTenantCtxAllocator::alloc(const int64_t size, const ObMemAttr &attr)
 {
   SANITY_DISABLE_CHECK_RANGE(); // prevent sanity_check_range
@@ -214,6 +213,7 @@ void ObTenantCtxAllocator::print_usage() const
     }
 
     if (ctx_hold_bytes > 0 || sum_item.used_ > 0) {
+      allow_next_syslog();
       _LOG_INFO("\n[MEMORY] tenant_id=%5ld ctx_id=%25s hold=% '15ld used=% '15ld limit=% '15ld"
                 "\n[MEMORY] idle_size=% '10ld free_size=% '10ld"
                 "\n[MEMORY] wash_related_chunks=% '10ld washed_blocks=% '10ld washed_size=% '10ld\n%s",

deps/oblib/src/lib/oblog/ob_log.cpp

@@ -39,6 +39,11 @@ namespace oceanbase
 namespace common
 {
 
+void __attribute__((weak)) allow_next_syslog(int64_t)
+{
+  // do nothing
+}
+
 const char* __attribute__((weak)) ob_strerror(const int oberr)
 {
   const char* ret = "ob_strerror";

deps/oblib/src/lib/oblog/ob_log.h

@@ -61,6 +61,8 @@ class ObVSliceAlloc;
 class ObBlockAllocMgr;
 class ObFIFOAllocator;
 class ObPLogItem;
+
+extern void allow_next_syslog(int64_t count = 1);
 extern int logdata_vprintf(char *buf, const int64_t buf_len, int64_t &pos, const char *fmt, va_list args);
 extern ObPLogFDType get_fd_type(const char *mod_name);
 

deps/oblib/src/lib/oblog/ob_log_module.h

@@ -309,6 +309,20 @@ LOG_MOD_END(PL)
 #define CANCLE_OB_LOG_TRACE_MODE()  OB_LOGGER.set_trace_mode(false)
 #define PRINT_OB_LOG_TRACE_BUF(mod_name, level)                                                            \
   (OB_LOG_NEED_TO_PRINT(level) ? OB_LOGGER.print_trace_buffer("["#mod_name"] ", OB_LOG_LEVEL_DIRECT_NO_ERRCODE(level)) : (void) 0)
+#define PRINT_WITH_TRACE_MODE(mod_name, level, body)      \
+{                                                         \
+  bool need_cancle_trace_mode = false;                    \
+  if (!IS_OB_LOG_TRACE_MODE()) {                          \
+    need_cancle_trace_mode = true;                        \
+  }                                                       \
+  SET_OB_LOG_TRACE_MODE();                                \
+  PRINT_OB_LOG_TRACE_BUF(COMMON, INFO);                   \
+  body;                                                   \
+  PRINT_OB_LOG_TRACE_BUF(mod_name, level);                \
+  if (need_cancle_trace_mode) {                           \
+    CANCLE_OB_LOG_TRACE_MODE();                           \
+  }                                                       \
+}
 
 //for tests/ob_log_test or others
 #define OB_LOG_MOD_NEED_TO_PRINT(parMod, level)                                                  \

deps/oblib/src/lib/trace/ob_trace.cpp

@@ -54,14 +54,9 @@ void flush_trace()
   auto& trace = *OBTRACE;
   auto& current_span = trace.current_span_;
   if (trace.is_inited() && !current_span.is_empty()) {
+    auto func = [&] {
       auto* span = current_span.get_first();
       ::oceanbase::trace::ObSpanCtx* next = nullptr;
-    bool need_cancle_trace_mode = false;
-    if (!IS_OB_LOG_TRACE_MODE()) {
-      need_cancle_trace_mode = true;
-    }
-    SET_OB_LOG_TRACE_MODE();
-    PRINT_OB_LOG_TRACE_BUF(COMMON, INFO);
       while (current_span.get_header() != span) {
         auto* next = span->get_next();
         if (nullptr != span->tags_ || 0 != span->end_ts_) {
@@ -115,10 +110,8 @@ void flush_trace()
         }
         span = next;
       }
-    PRINT_OB_LOG_TRACE_BUF(OBTRACE, INFO);
+    };
-    if (need_cancle_trace_mode) {
+    PRINT_WITH_TRACE_MODE(OBTRACE, INFO, func());
-      CANCLE_OB_LOG_TRACE_MODE();
-    }
     trace.offset_ = trace.buffer_size_ / 2;
   }
 }

mittest/mtlenv/mock_tenant_module_env.h

@@ -614,6 +614,8 @@ int MockTenantModuleEnv::init_before_start_mtl()
     STORAGE_LOG(ERROR, "failed to init bandwidth_throttle_", K(ret));
   } else if (OB_FAIL(TG_START(lib::TGDefIDs::ServerGTimer))) {
     STORAGE_LOG(ERROR, "init timer fail", KR(ret));
+  } else if (OB_FAIL(TG_START(lib::TGDefIDs::MemDumpTimer))) {
+    STORAGE_LOG(ERROR, "init memory dump timer fail", KR(ret));
   } else if (OB_FAIL(ObOptStatMonitorManager::get_instance().init(&sql_proxy_))) {
     STORAGE_LOG(ERROR, "failed to init opt stat monitor manager", KR(ret));
   } else {
@@ -761,6 +763,11 @@ void MockTenantModuleEnv::destroy()
   TG_WAIT(lib::TGDefIDs::ServerGTimer);
   TG_DESTROY(lib::TGDefIDs::ServerGTimer);
 
+  TG_STOP(lib::TGDefIDs::MemDumpTimer);
+  TG_WAIT(lib::TGDefIDs::MemDumpTimer);
+  TG_DESTROY(lib::TGDefIDs::MemDumpTimer);
+
+
   destroyed_ = true;
 
   chdir(curr_dir_);

src/observer/ob_server.cpp

@@ -502,6 +502,10 @@ void ObServer::destroy()
     TG_DESTROY(lib::TGDefIDs::CTASCleanUpTimer);
     FLOG_INFO("ctas clean up timer destroyed");
 
+    FLOG_INFO("begin to destroy memory dump timer");
+    TG_DESTROY(lib::TGDefIDs::MemDumpTimer);
+    FLOG_INFO("memory dump timer destroyed");
+
     FLOG_INFO("begin to destroy redef heart beat task");
     TG_DESTROY(lib::TGDefIDs::RedefHeartBeatTask);
     FLOG_INFO("redef heart beat task destroyed");
@@ -1039,6 +1043,10 @@ int ObServer::stop()
     TG_STOP(lib::TGDefIDs::CTASCleanUpTimer);
     FLOG_INFO("ctas clean up timer stopped");
 
+    FLOG_INFO("begin to stop memory dump timer");
+    TG_STOP(lib::TGDefIDs::MemDumpTimer);
+    FLOG_INFO("memory dump timer stopped");
+
     FLOG_INFO("begin to stop ctas clean up timer");
     TG_STOP(lib::TGDefIDs::HeartBeatCheckTask);
     FLOG_INFO("ctas clean up timer stopped");
@@ -1239,6 +1247,10 @@ int ObServer::wait()
     TG_WAIT(lib::TGDefIDs::CTASCleanUpTimer);
     FLOG_INFO("wait ctas clean up timer success");
 
+    FLOG_INFO("begin to wait memory dump timer");
+    TG_WAIT(lib::TGDefIDs::MemDumpTimer);
+    FLOG_INFO("wait memory dump timer success");
+
     FLOG_INFO("begin to wait root service");
     root_service_.wait();
     FLOG_INFO("wait root service success");
@@ -1527,6 +1539,8 @@ int ObServer::init_config()
         LOG_ERROR("fail to init server trace timer", KR(ret));
       } else if (OB_FAIL(TG_START(lib::TGDefIDs::CTASCleanUpTimer))) {
         LOG_ERROR("fail to init ctas clean up timer", KR(ret));
+      } else if (OB_FAIL(TG_START(lib::TGDefIDs::MemDumpTimer))) {
+        LOG_ERROR("fail to init memory dump timer", KR(ret));
       } else if (OB_FAIL(config_mgr_.base_init())) {
         LOG_ERROR("config_mgr_ base_init failed", KR(ret));
       } else if (OB_FAIL(config_mgr_.init(sql_proxy_, self_addr_))) {

src/observer/omt/ob_multi_tenant.cpp

@@ -390,7 +390,7 @@ int ObMultiTenant::start()
   } else if (OB_FAIL(ObTenantNodeBalancer::get_instance().start())) {
     LOG_ERROR("start tenant node balancer thread failed", K(ret));
   // start memstore print timer.
-  } else if (OB_FAIL(printer.register_timer_task(lib::TGDefIDs::ServerGTimer))) {
+  } else if (OB_FAIL(printer.register_timer_task(lib::TGDefIDs::MemDumpTimer))) {
     LOG_ERROR("Fail to register timer task", K(ret));
   } else {
     LOG_INFO("succ to start multi tenant");

src/share/ob_task_define.cpp

@@ -27,6 +27,13 @@ using namespace oceanbase::lib;
 using namespace oceanbase::common;
 
 namespace oceanbase {
+namespace common {
+void allow_next_syslog(int64_t count)
+{
+  share::ObTaskController::get().allow_next_syslog(count);
+}
+} // common
+
 namespace share {
 
 class ObSyslogPerErrLimiter : public common::ObISyslogRateLimiter

src/share/ob_thread_define.h

@@ -128,4 +128,5 @@ TG_DEF(CDCService, CDCSrv, "", TG_STATIC, OB_THREAD_POOL, ThreadCountPair(1, 1))
 TG_DEF(LogUpdater, LogUpdater, "", TG_STATIC, TIMER)
 TG_DEF(HeartBeatCheckTask, HeartBeatCheckTask, "", TG_STATIC, TIMER)
 TG_DEF(RedefHeartBeatTask, RedefHeartBeatTask, "", TG_STATIC, TIMER)
+TG_DEF(MemDumpTimer, MemDumpTimer, "", TG_STATIC, TIMER)
 #endif

src/storage/tx_storage/ob_tenant_memory_printer.cpp

@@ -25,12 +25,11 @@ namespace oceanbase
 using namespace share;
 namespace storage
 {
-
 void ObPrintTenantMemoryUsage::runTimerTask()
 {
   LOG_INFO("=== Run print tenant memory usage task ===");
   ObTenantMemoryPrinter &printer = ObTenantMemoryPrinter::get_instance();
-  printer.print_tenant_usage();
+  PRINT_WITH_TRACE_MODE(LIB, INFO, printer.print_tenant_usage());
   ObObjFreeListList::get_freelists().dump();
 }