ClickHouse/base/loggers/OwnSplitChannel.cpp
Azat Khuzhin c65ae8ac31 Do not check writeRetry errors in OwnSplitChannel
Should fix PVS warning:

  "There are identical sub-expressions '!writeRetry(2, "\n")' to the left and to the right of the '||' operator."
2021-06-07 09:40:29 +03:00

153 lines
4.9 KiB
C++

#include "OwnSplitChannel.h"
#include <iostream>
#include <Core/Block.h>
#include <Interpreters/InternalTextLogsQueue.h>
#include <Interpreters/TextLog.h>
#include <IO/WriteBufferFromFileDescriptor.h>
#include <sys/time.h>
#include <Poco/Message.h>
#include <Common/CurrentThread.h>
#include <Common/DNSResolver.h>
#include <common/getThreadId.h>
#include <Common/SensitiveDataMasker.h>
#include <Common/IO.h>
namespace DB
{
void OwnSplitChannel::log(const Poco::Message & msg)
{
auto logs_queue = CurrentThread::getInternalTextLogsQueue();
if (channels.empty() && (logs_queue == nullptr || msg.getPriority() > logs_queue->max_priority))
return;
if (auto * masker = SensitiveDataMasker::getInstance())
{
auto message_text = msg.getText();
auto matches = masker->wipeSensitiveData(message_text);
if (matches > 0)
{
tryLogSplit({msg, message_text}); // we will continue with the copy of original message with text modified
return;
}
}
tryLogSplit(msg);
}
void OwnSplitChannel::tryLogSplit(const Poco::Message & msg)
{
try
{
logSplit(msg);
}
/// It is better to catch the errors here in order to avoid
/// breaking some functionality because of unexpected "File not
/// found" (or similar) error.
///
/// For example StorageDistributedDirectoryMonitor will mark batch
/// as broken, some MergeTree code can also be affected.
///
/// Also note, that we cannot log the exception here, since this
/// will lead to recursion, using regular tryLogCurrentException().
/// but let's log it into the stderr at least.
catch (...)
{
MemoryTracker::LockExceptionInThread lock_memory_tracker(VariableContext::Global);
const std::string & exception_message = getCurrentExceptionMessage(true);
const std::string & message = msg.getText();
/// NOTE: errors are ignored, since nothing can be done.
writeRetry(STDERR_FILENO, "Cannot add message to the log: ");
writeRetry(STDERR_FILENO, message.data(), message.size());
writeRetry(STDERR_FILENO, "\n");
writeRetry(STDERR_FILENO, exception_message.data(), exception_message.size());
writeRetry(STDERR_FILENO, "\n");
}
}
void OwnSplitChannel::logSplit(const Poco::Message & msg)
{
ExtendedLogMessage msg_ext = ExtendedLogMessage::getFrom(msg);
/// Log data to child channels
for (auto & channel : channels)
{
if (channel.second)
channel.second->logExtended(msg_ext); // extended child
else
channel.first->log(msg); // ordinary child
}
auto logs_queue = CurrentThread::getInternalTextLogsQueue();
/// Log to "TCP queue" if message is not too noisy
if (logs_queue && msg.getPriority() <= logs_queue->max_priority)
{
MutableColumns columns = InternalTextLogsQueue::getSampleColumns();
size_t i = 0;
columns[i++]->insert(msg_ext.time_seconds);
columns[i++]->insert(msg_ext.time_microseconds);
columns[i++]->insert(DNSResolver::instance().getHostName());
columns[i++]->insert(msg_ext.query_id);
columns[i++]->insert(msg_ext.thread_id);
columns[i++]->insert(Int64(msg.getPriority()));
columns[i++]->insert(msg.getSource());
columns[i++]->insert(msg.getText());
logs_queue->emplace(std::move(columns));
}
/// Also log to system.text_log table, if message is not too noisy
auto text_log_max_priority_loaded = text_log_max_priority.load(std::memory_order_relaxed);
if (text_log_max_priority_loaded && msg.getPriority() <= text_log_max_priority_loaded)
{
TextLogElement elem;
elem.event_time = msg_ext.time_seconds;
elem.event_time_microseconds = msg_ext.time_in_microseconds;
elem.microseconds = msg_ext.time_microseconds;
elem.thread_name = getThreadName();
elem.thread_id = msg_ext.thread_id;
elem.query_id = msg_ext.query_id;
elem.message = msg.getText();
elem.logger_name = msg.getSource();
elem.level = msg.getPriority();
if (msg.getSourceFile() != nullptr)
elem.source_file = msg.getSourceFile();
elem.source_line = msg.getSourceLine();
std::shared_ptr<TextLog> text_log_locked{};
{
std::lock_guard<std::mutex> lock(text_log_mutex);
text_log_locked = text_log.lock();
}
if (text_log_locked)
text_log_locked->add(elem);
}
}
void OwnSplitChannel::addChannel(Poco::AutoPtr<Poco::Channel> channel)
{
channels.emplace_back(std::move(channel), dynamic_cast<ExtendedLogChannel *>(channel.get()));
}
void OwnSplitChannel::addTextLog(std::shared_ptr<DB::TextLog> log, int max_priority)
{
std::lock_guard<std::mutex> lock(text_log_mutex);
text_log = log;
text_log_max_priority.store(max_priority, std::memory_order_relaxed);
}
}