2020.08.12 13:48:26.600289 [ 44 ] {} <Error> DDLWorker: ZooKeeper error: Code: 999, e.displayText() = Coordination::Exception: No node, path: /clickhouse/task_queue/ddl, Stack trace (when copying this message, always include the lines below):

0. 0xbc31d9c Poco::Exception::Exception(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, int)  in /usr/bin/clickhouse
1. 0x4f6ccd9 DB::Exception::Exception(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, int)  in /usr/bin/clickhouse
2. 0x98402a4 Coordination::Exception::Exception(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, int, int)  in /usr/bin/clickhouse
3. 0x98406af Coordination::Exception::Exception(int, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)  in /usr/bin/clickhouse
4. 0x4ccac84 ?  in /usr/bin/clickhouse
5. 0x8ba83ea DB::DDLWorker::processTasks()  in /usr/bin/clickhouse
6. 0x8ba98f0 DB::DDLWorker::runMainThread()  in /usr/bin/clickhouse
7. 0x8babcf1 ThreadFromGlobalPool::ThreadFromGlobalPool<void (DB::DDLWorker::*)(), DB::DDLWorker*>(void (DB::DDLWorker::*&&)(), DB::DDLWorker*&&)::'lambda'()::operator()() const  in /usr/bin/clickhouse
8. 0x4fa3b77 ThreadPoolImpl<std::__1::thread>::worker(std::__1::__list_iterator<std::__1::thread, void*>)  in /usr/bin/clickhouse
9. 0x4fa212f ?  in /usr/bin/clickhouse
10. 0x76db start_thread  in /lib/x86_64-linux-gnu/libpthread-2.27.so
11. 0x12188f clone  in /lib/x86_64-linux-gnu/libc-2.27.so
 (version 20.1.2.4 (official build))