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Add reconnects to zookeeper-dump-tree tool

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This commit is contained in:
Alexey Milovidov 2020-10-07 11:41:27 +03:00
parent 554fa482e6
commit ce7b8aefd2
1 changed files with 25 additions and 4 deletions
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29
utils/zookeeper-dump-tree/main.cpp
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@ -29,16 +29,20 @@ try
return 1; return 1;
} }
zkutil::ZooKeeper zookeeper(options.at("address").as<std::string>()); zkutil::ZooKeeperPtr zookeeper = std::make_shared<zkutil::ZooKeeper>(options.at("address").as<std::string>());
std::string initial_path = options.at("path").as<std::string>(); std::string initial_path = options.at("path").as<std::string>();
std::list<std::pair<std::string, std::future<Coordination::ListResponse>>> list_futures; std::list<std::pair<std::string, std::future<Coordination::ListResponse>>> list_futures;
list_futures.emplace_back(initial_path, zookeeper.asyncGetChildren(initial_path)); list_futures.emplace_back(initial_path, zookeeper->asyncGetChildren(initial_path));
size_t num_reconnects = 0;
constexpr size_t max_reconnects = 100;
for (auto it = list_futures.begin(); it != list_futures.end(); ++it) for (auto it = list_futures.begin(); it != list_futures.end(); ++it)
{ {
Coordination::ListResponse response; Coordination::ListResponse response;
try try
{ {
response = it->second.get(); response = it->second.get();
@ -46,8 +50,25 @@ try
catch (const Coordination::Exception & e) catch (const Coordination::Exception & e)
{ {
if (e.code == Coordination::Error::ZNONODE) if (e.code == Coordination::Error::ZNONODE)
{
continue; continue;
throw; }
else if (Coordination::isHardwareError(e.code))
{
/// Reinitialize the session and move the node to the end of the queue for later retry.
if (zookeeper->expired())
{
if (num_reconnects == max_reconnects)
throw;
++num_reconnects;
zookeeper = zookeeper->startNewSession();
}
list_futures.emplace_back(it->first, zookeeper->asyncGetChildren(it->first));
continue;
}
else
throw;
} }
std::cout << it->first << '\t' << response.stat.numChildren << '\t' << response.stat.dataLength << '\n'; std::cout << it->first << '\t' << response.stat.numChildren << '\t' << response.stat.dataLength << '\n';
@ -55,7 +76,7 @@ try
for (const auto & name : response.names) for (const auto & name : response.names)
{ {
std::string child_path = it->first == "/" ? it->first + name : it->first + '/' + name; std::string child_path = it->first == "/" ? it->first + name : it->first + '/' + name;
list_futures.emplace_back(child_path, zookeeper.asyncGetChildren(child_path)); list_futures.emplace_back(child_path, zookeeper->asyncGetChildren(child_path));
} }
} }
} }