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Merge pull request #36113 from ClickHouse/remove-useless-code-2

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Remove useless code in ReplicatedMergeTreeRestartingThread
This commit is contained in:
Alexander Tokmakov 2022-06-09 17:56:28 +03:00 committed by GitHub
commit 780f7c87c7
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14 changed files with 49 additions and 47 deletions
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15
src/Common/ZooKeeper/ZooKeeper.cpp
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@ -841,6 +841,21 @@ bool ZooKeeper::waitForDisappear(const std::string & path, const WaitCondition &
return false;
}
void ZooKeeper::waitForEphemeralToDisappearIfAny(const std::string & path)
{
zkutil::EventPtr eph_node_disappeared = std::make_shared<Poco::Event>();
String content;
if (!tryGet(path, content, nullptr, eph_node_disappeared))
return;
int32_t timeout_ms = 2 * session_timeout_ms;
if (!eph_node_disappeared->tryWait(timeout_ms))
throw DB::Exception(DB::ErrorCodes::LOGICAL_ERROR,
"Ephemeral node {} still exists after {}s, probably it's owned by someone else. "
"Either session_timeout_ms in client's config is different from server's config or it's a bug. "
"Node data: '{}'", path, timeout_ms / 1000, content);
}
ZooKeeperPtr ZooKeeper::startNewSession() const
{
return std::make_shared<ZooKeeper>(hosts, identity, session_timeout_ms, operation_timeout_ms, chroot, implementation, zk_log, get_priority_load_balancing);

4
src/Common/ZooKeeper/ZooKeeper.h
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@ -240,6 +240,10 @@ public:
/// The function returns true if waited and false if waiting was interrupted by condition.
bool waitForDisappear(const std::string & path, const WaitCondition & condition = {});
/// Wait for the ephemeral node created in previous session to disappear.
/// Throws LOGICAL_ERROR if node still exists after 2x session_timeout.
void waitForEphemeralToDisappearIfAny(const std::string & path);
/// Async interface (a small subset of operations is implemented).
///
/// Usage:

14
src/Common/randomSeed.cpp
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@ -7,6 +7,9 @@
#include <base/getThreadId.h>
#include <base/types.h>
#if defined(__linux__)
#include <sys/utsname.h>
#endif
namespace DB
{
@ -29,6 +32,15 @@ DB::UInt64 randomSeed()
hash.update(times.tv_nsec);
hash.update(times.tv_sec);
hash.update(getThreadId());
hash.update(&times);
/// It makes sense to add something like hostname to avoid seed collision when multiple servers start simultaneously.
/// But randomSeed() must be signal-safe and gethostname and similar functions are not.
/// Let's try to get utsname.nodename using uname syscall (it's signal-safe).
#if defined(__linux__)
struct utsname sysinfo;
if (uname(&sysinfo) == 0)
hash.update(sysinfo);
#endif
return hash.get64();
}

10
src/Interpreters/DDLWorker.cpp
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@ -547,15 +547,7 @@ void DDLWorker::processTask(DDLTaskBase & task, const ZooKeeperPtr & zookeeper)
{
/// Connection has been lost and now we are retrying,
/// but our previous ephemeral node still exists.
zkutil::EventPtr eph_node_disappeared = std::make_shared<Poco::Event>();
String dummy;
if (zookeeper->tryGet(active_node_path, dummy, nullptr, eph_node_disappeared))
{
constexpr int timeout_ms = 60 * 1000;
if (!eph_node_disappeared->tryWait(timeout_ms))
throw Exception(ErrorCodes::LOGICAL_ERROR, "Ephemeral node {} still exists, "
"probably it's owned by someone else", active_node_path);
}
zookeeper->waitForEphemeralToDisappearIfAny(active_node_path);
}
zookeeper->create(active_node_path, {}, zkutil::CreateMode::Ephemeral);

1
src/Processors/Formats/Impl/ParallelFormattingOutputFormat.cpp
View File

@ -212,6 +212,7 @@ namespace DB
break;
}
}
/// Flush all the data to handmade buffer.
formatter->flush();
unit.actual_memory_size = out_buffer.getActualSize();

1
src/Storages/MergeTree/MergeFromLogEntryTask.cpp
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@ -181,7 +181,6 @@ ReplicatedMergeMutateTaskBase::PrepareResult MergeFromLogEntryTask::prepare()
future_merged_part->updatePath(storage, reserved_space.get());
future_merged_part->merge_type = entry.merge_type;
if (storage_settings_ptr->allow_remote_fs_zero_copy_replication)
{
if (auto disk = reserved_space->getDisk(); disk->supportZeroCopyReplication())

20
src/Storages/MergeTree/ReplicatedMergeTreeRestartingThread.cpp
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@ -303,25 +303,7 @@ void ReplicatedMergeTreeRestartingThread::activateReplica()
ReplicatedMergeTreeAddress address = storage.getReplicatedMergeTreeAddress();
String is_active_path = fs::path(storage.replica_path) / "is_active";
/** If the node is marked as active, but the mark is made in the same instance, delete it.
* This is possible only when session in ZooKeeper expires.
*/
String data;
Coordination::Stat stat;
bool has_is_active = zookeeper->tryGet(is_active_path, data, &stat);
if (has_is_active && data == active_node_identifier)
{
auto code = zookeeper->tryRemove(is_active_path, stat.version);
if (code == Coordination::Error::ZBADVERSION)
throw Exception("Another instance of replica " + storage.replica_path + " was created just now."
" You shouldn't run multiple instances of same replica. You need to check configuration files.",
ErrorCodes::REPLICA_IS_ALREADY_ACTIVE);
if (code != Coordination::Error::ZOK && code != Coordination::Error::ZNONODE)
throw Coordination::Exception(code, is_active_path);
}
zookeeper->waitForEphemeralToDisappearIfAny(is_active_path);
/// Simultaneously declare that this replica is active, and update the host.
Coordination::Requests ops;

3
src/Storages/StorageReplicatedMergeTree.cpp
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@ -35,7 +35,6 @@
#include <Storages/MergeTree/LeaderElection.h>
#include <Storages/MergeTree/ZeroCopyLock.h>
#include <Databases/DatabaseOnDisk.h>
#include <Parsers/formatAST.h>
@ -93,6 +92,7 @@
#include <thread>
#include <future>
namespace fs = std::filesystem;
namespace ProfileEvents
@ -5770,7 +5770,6 @@ void StorageReplicatedMergeTree::fetchPartition(
String best_replica;
{
/// List of replicas of source shard.
replicas = zookeeper->getChildren(fs::path(from) / "replicas");

2
tests/integration/helpers/keeper_config1.xml
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@ -15,7 +15,7 @@
<coordination_settings>
<operation_timeout_ms>10000</operation_timeout_ms>
<session_timeout_ms>30000</session_timeout_ms>
<session_timeout_ms>15000</session_timeout_ms>
<raft_logs_level>trace</raft_logs_level>
<force_sync>false</force_sync>
</coordination_settings>

2
tests/integration/helpers/keeper_config2.xml
View File

@ -15,7 +15,7 @@
<coordination_settings>
<operation_timeout_ms>10000</operation_timeout_ms>
<session_timeout_ms>30000</session_timeout_ms>
<session_timeout_ms>15000</session_timeout_ms>
<raft_logs_level>trace</raft_logs_level>
<force_sync>false</force_sync>
</coordination_settings>

2
tests/integration/helpers/keeper_config3.xml
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@ -15,7 +15,7 @@
<coordination_settings>
<operation_timeout_ms>10000</operation_timeout_ms>
<session_timeout_ms>30000</session_timeout_ms>
<session_timeout_ms>15000</session_timeout_ms>
<raft_logs_level>trace</raft_logs_level>
<force_sync>false</force_sync>
</coordination_settings>

2
tests/integration/helpers/zookeeper_config.xml
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@ -12,6 +12,6 @@
<host>zoo3</host>
<port>2181</port>
</node>
<session_timeout_ms>3000</session_timeout_ms>
<session_timeout_ms>15000</session_timeout_ms>
</zookeeper>
</clickhouse>

2
tests/integration/helpers/zookeeper_secure_config.xml
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@ -12,6 +12,6 @@
<host>zoo3</host>
<port>2281</port>
</node>
<session_timeout_ms>3000</session_timeout_ms>
<session_timeout_ms>15000</session_timeout_ms>
</zookeeper>
</clickhouse>

6
tests/integration/test_polymorphic_parts/test.py
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@ -698,10 +698,8 @@ def test_in_memory_alters(start_cluster):
expected = "1\tab\t0\n2\tcd\t0\n"
assert node9.query("SELECT id, s, col1 FROM alters_table ORDER BY id") == expected
check_parts_type(1)
# After hard restart table can be in readonly mode
exec_query_with_retry(
node9,
"INSERT INTO alters_table (date, id, col1) VALUES (toDate('2020-10-10'), 3, 100)",
node9.query(
"INSERT INTO alters_table (date, id, col1) VALUES (toDate('2020-10-10'), 3, 100)"
)
node9.query("ALTER TABLE alters_table MODIFY COLUMN col1 String")
node9.query("ALTER TABLE alters_table DROP COLUMN s")