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Merged
SatheeshkumarG15 merged 8 commits into from
Jul 14, 2026
Merged

Add configurable sinks to postmortem WorkerPool and callstack dumps #2169

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8f0fd4f
postmortem: add configurable sink controls for WorkerPool and callsta…
SatheeshkumarG15 Jul 8, 2026
bdb087b
Added missing postmortem sink defaults to thunder_test_support compil…
SatheeshkumarG15 Jul 9, 2026
eed8051
Modified bridge.vcxproj to fix ThunderOnWindows failure in the PR
SatheeshkumarG15 Jul 9, 2026
854b458
Addressed co-pilot's valid comments
SatheeshkumarG15 Jul 9, 2026
687a210
Addressed few more co-pilot's comments
SatheeshkumarG15 Jul 9, 2026
92d8726
Removed postmortemcallstacksinkpath to create all the postmortemsinks…
SatheeshkumarG15 Jul 13, 2026
981a974
Addressed reviewer's comment and updated to Core::JSON::EnumType
SatheeshkumarG15 Jul 13, 2026
32d8fc0
Addressed co-pilot comments
SatheeshkumarG15 Jul 13, 2026
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23 changes: 23 additions & 0 deletions Source/Thunder/CMakeLists.txt
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Expand Up @@ -22,6 +22,27 @@ get_filename_component(TARGET ${CMAKE_CURRENT_SOURCE_DIR} NAME)
set(THREADPOOL_COUNT "4" CACHE STRING "The number of threads in the thread pool")
set(ENABLE_TRACING_MODULES "" CACHE STRING "A space separated list of specific tracing modules to be enabled at start.")

macro(thunder_postmortem_sink_value VAR_IN VAR_OUT)
string(TOUPPER "${${VAR_IN}}" _s)
if (_s STREQUAL "LOG")
set(${VAR_OUT} 1)
elseif(_s STREQUAL "ALL")
set(${VAR_OUT} 2)
elseif(_s STREQUAL "DISABLED")
set(${VAR_OUT} 3)
else()
set(${VAR_OUT} 0)
endif()
endmacro()

set(POSTMORTEM_WORKERPOOL_SINK "FILE" CACHE STRING "Default WorkerPool JSON dump sink on crash (FILE | LOG | ALL | DISABLED)")
set(POSTMORTEM_CALLSTACK_SINK "DISABLED" CACHE STRING "Default inline callstack print sink on crash (FILE | LOG | ALL | DISABLED)")
set_property(CACHE POSTMORTEM_WORKERPOOL_SINK PROPERTY STRINGS FILE LOG ALL DISABLED)
set_property(CACHE POSTMORTEM_CALLSTACK_SINK PROPERTY STRINGS FILE LOG ALL DISABLED)
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thunder_postmortem_sink_value(POSTMORTEM_WORKERPOOL_SINK _wp_sink)
thunder_postmortem_sink_value(POSTMORTEM_CALLSTACK_SINK _cs_sink)

option(SKIP_PERSISTENT_PATH_INSTALL "This will skip installing the persistent path and its privileges. Needed for local build/installs" OFF)

add_executable(${TARGET}
Expand All @@ -38,6 +59,8 @@ target_compile_definitions(${TARGET}
NAMESPACE=${NAMESPACE}
APPLICATION_NAME=${TARGET}
THREADPOOL_COUNT=${THREADPOOL_COUNT}
THUNDER_POSTMORTEM_WORKERPOOL_SINK_DEFAULT=${_wp_sink}
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THUNDER_POSTMORTEM_CALLSTACK_SINK_DEFAULT=${_cs_sink}
)

target_compile_options (${TARGET} PRIVATE -Wno-psabi)
Expand Down
43 changes: 43 additions & 0 deletions Source/Thunder/Config.h
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Expand Up @@ -25,6 +25,25 @@
namespace Thunder {

namespace PluginHost {

enum class PostMortemDataSink : uint8_t {
FILE = 0,
LOG = 1,
ALL = 2,
DISABLED = 3
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};

static inline PostMortemDataSink ParsePostMortemDataSink(const string& input, PostMortemDataSink fallback)
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{
string s(input);
std::transform(s.begin(), s.end(), s.begin(), [](unsigned char c) { return static_cast<char>(::tolower(c)); });
if (s == _T("log")) return PostMortemDataSink::LOG;
else if (s == _T("all")) return PostMortemDataSink::ALL;
else if (s == _T("disabled")) return PostMortemDataSink::DISABLED;
else if (s == _T("file")) return PostMortemDataSink::FILE;
return fallback;
}

/**
* IMPORTANT: If updating this class to add/remove/modify configuration options, ensure
* the documentation in docs/introduction/config.md is updated to reflect the changes!
Expand Down Expand Up @@ -459,6 +478,8 @@ namespace PluginHost {
Add(_T("volatilepath"), &VolatilePath);
Add(_T("proxystubpath"), &ProxyStubPath);
Add(_T("postmortempath"), &PostMortemPath);
Add(_T("postmortemworkerpoolsink"), &PostMortemWorkerPoolSink);
Add(_T("postmortemcallstacksink"), &PostMortemCallstackSink);
Add(_T("communicator"), &Communicator);
Add(_T("signature"), &Signature);
Add(_T("idletime"), &IdleTime);
Expand Down Expand Up @@ -515,6 +536,8 @@ namespace PluginHost {
Core::JSON::String VolatilePath;
Core::JSON::String ProxyStubPath;
Core::JSON::String PostMortemPath;
Core::JSON::String PostMortemWorkerPoolSink;
Core::JSON::String PostMortemCallstackSink;
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Core::JSON::String Communicator;
Core::JSON::String Redirect;
Core::JSON::String Signature;
Expand Down Expand Up @@ -695,6 +718,8 @@ namespace PluginHost {
, _proxyStubPath()
, _observableProxyStubPath()
, _postMortemPath()
, _workerPoolSink(static_cast<PostMortemDataSink>(THUNDER_POSTMORTEM_WORKERPOOL_SINK_DEFAULT))
, _callstackSink(static_cast<PostMortemDataSink>(THUNDER_POSTMORTEM_CALLSTACK_SINK_DEFAULT))
, _pluginConfigPath()
, _accessor()
, _communicator()
Expand Down Expand Up @@ -808,6 +833,14 @@ namespace PluginHost {
_pluginConfigPath = Core::Directory::Normalize(config.Observe.PluginConfigPath.Value());
}
_postMortemPath = Core::Directory::Normalize(config.PostMortemPath.Value());
_workerPoolSink = config.PostMortemWorkerPoolSink.IsSet()
? ParsePostMortemDataSink(config.PostMortemWorkerPoolSink.Value(),
PostMortemDataSink::FILE)
: static_cast<PostMortemDataSink>(THUNDER_POSTMORTEM_WORKERPOOL_SINK_DEFAULT);
_callstackSink = config.PostMortemCallstackSink.IsSet()
? ParsePostMortemDataSink(config.PostMortemCallstackSink.Value(),
PostMortemDataSink::DISABLED)
: static_cast<PostMortemDataSink>(THUNDER_POSTMORTEM_CALLSTACK_SINK_DEFAULT);
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_appPath = Core::Directory::Normalize(Core::File::PathName(Core::ProcessInfo().Executable()));
_hashKey = config.Signature.Value();
_communicator = Core::NodeId(config.Communicator.Value().c_str());
Expand Down Expand Up @@ -1039,6 +1072,14 @@ namespace PluginHost {
{
return (_postMortemPath);
}
inline PostMortemDataSink PostMortemWorkerPoolSink() const
{
return (_workerPoolSink);
}
inline PostMortemDataSink PostMortemCallstackSink() const
{
return (_callstackSink);
}
inline bool PostMortemAllowed(PluginHost::IShell::reason why) const
{
std::list<PluginHost::IShell::reason>::const_iterator index(std::find(_reasons.begin(), _reasons.end(), why));
Expand Down Expand Up @@ -1334,6 +1375,8 @@ namespace PluginHost {
string _proxyStubPath;
string _observableProxyStubPath;
string _postMortemPath;
PostMortemDataSink _workerPoolSink;
PostMortemDataSink _callstackSink;
string _pluginConfigPath;
Core::NodeId _accessor;
Core::NodeId _communicator;
Expand Down
2 changes: 2 additions & 0 deletions Source/Thunder/GenericConfig.cmake
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Expand Up @@ -89,6 +89,8 @@ map_set(${CONFIG} systempath ${SYSTEM_PATH})
map_set(${CONFIG} extensionpath ${EXTENSION_PATH})
map_set(${CONFIG} proxystubpath ${PROXYSTUB_PATH})
map_set(${CONFIG} postmortempath ${POSTMORTEM_PATH})
map_set(${CONFIG} postmortemworkerpoolsink ${POSTMORTEM_WORKERPOOL_SINK})
map_set(${CONFIG} postmortemcallstacksink ${POSTMORTEM_CALLSTACK_SINK})
map_set(${CONFIG} redirect "/Service/Controller/UI/index.html")
map_set(${CONFIG} ethernetcard ${ETHERNETCARD_NAME})
if(NOT COMMUNICATOR STREQUAL "")
Expand Down
47 changes: 38 additions & 9 deletions Source/Thunder/PluginServer.h
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Expand Up @@ -5694,15 +5694,32 @@ namespace PluginHost {

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Core::JSON::ArrayType<Metadata::Server::Minion>::Iterator index(data.WorkerPool.ThreadPoolRuns.Elements());

const PluginHost::PostMortemDataSink wpSink = _config.PostMortemWorkerPoolSink();
const PluginHost::PostMortemDataSink csSink = _config.PostMortemCallstackSink();

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if ((wpSink == PluginHost::PostMortemDataSink::DISABLED) && (csSink == PluginHost::PostMortemDataSink::DISABLED)) {
return;
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}

while (index.Next() == true) {

const uint64_t threadIdRaw = index.Current().Id.Value();

std::list<Core::callstack_info> stackList;
if (index.Current().Id.Value() != 0) {
::DumpCallStack(PluginHost::Metadata::ThreadId(index.Current().Id.Value()), stackList);
if (threadIdRaw != 0) {
::DumpCallStack(PluginHost::Metadata::ThreadId(threadIdRaw), stackList);
}
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if (csSink == PluginHost::PostMortemDataSink::LOG || csSink == PluginHost::PostMortemDataSink::ALL) {
for (const Core::callstack_info& entry : stackList) {
const char* sym = entry.function.empty() ? "Unknown symbol" : entry.function.c_str();
SYSLOG(Logging::Shutdown, (_T("[%s]:[%s]:[%u]:[%p]"),
entry.module.c_str(), sym, static_cast<unsigned int>(entry.line), entry.address));
}
}

PostMortemData::Callstack dump;
dump.Id = index.Current().Id.Value();
dump.Id = threadIdRaw;

for (const Core::callstack_info& info : stackList) {
dump.Data.Add() = CallstackData(info);
Expand All @@ -5711,13 +5728,25 @@ namespace PluginHost {
data.Callstacks.Add(dump);
}

if (csSink == PluginHost::PostMortemDataSink::FILE || csSink == PluginHost::PostMortemDataSink::ALL) {
DumpReadableMetadata(data, _config.PostMortemPath());
}

// Drop the workerpool info (what is currently running and what is pending) to a file..
Core::File dumpFile(_config.PostMortemPath() + "ThunderInternals.json");
if (dumpFile.Create(false) == true) {
data.IElement::ToFile(dumpFile);
if (wpSink == PluginHost::PostMortemDataSink::FILE || wpSink == PluginHost::PostMortemDataSink::ALL) {
Core::File dumpFile(_config.PostMortemPath() + "ThunderInternals.json");
if (dumpFile.Create(false) == true) {
data.IElement::ToFile(dumpFile);
}
}

DumpReadableMetadata(data);
if (wpSink == PluginHost::PostMortemDataSink::LOG || wpSink == PluginHost::PostMortemDataSink::ALL) {
string jsonContent;
data.IElement::ToString(jsonContent);
SYSLOG(Logging::Shutdown, (_T("WorkerPool snapshot start\n")));
SYSLOG(Logging::Shutdown, (_T("[%s]\n"), jsonContent.c_str()));
SYSLOG(Logging::Shutdown, (_T("WorkerPool snapshot end\n")));
}
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}
inline ServiceMap& Services()
{
Expand Down Expand Up @@ -5797,7 +5826,7 @@ namespace PluginHost {
}

private:
void DumpReadableMetadata(PostMortemData& data) const
void DumpReadableMetadata(PostMortemData& data, const string& outputPath) const
{
string readableDump;

Expand Down Expand Up @@ -5874,7 +5903,7 @@ namespace PluginHost {
appendReadableStack(index.Current());
}

Core::File readableDumpFile(_config.PostMortemPath() + "ThunderInternals.txt");
Core::File readableDumpFile(outputPath + "ThunderInternals.txt");
if (readableDumpFile.Create(false) == true) {
const uint32_t dumpSize = static_cast<uint32_t>(readableDump.length() * sizeof(string::value_type));
const uint32_t written = readableDumpFile.Write(reinterpret_cast<const uint8_t*>(readableDump.c_str()), dumpSize);
Expand Down
2 changes: 2 additions & 0 deletions Source/Thunder/Thunder.conf.in
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Expand Up @@ -12,6 +12,8 @@ systempath = '@SYSTEM_PATH@'
extensionpath = '@EXTENSION_PATH@'
proxystubpath = '@PROXYSTUB_PATH@'
postmortempath = '@POSTMORTEM_PATH@'
postmortemworkerpoolsink = '@POSTMORTEM_WORKERPOOL_SINK@'
postmortemcallstacksink = '@POSTMORTEM_CALLSTACK_SINK@'
redirect = '/Service/Controller/UI/index.html'
ethernetcard = '@ETHERNETCARD_NAME@'
communicator = '@COMMUNICATOR@'
Expand Down
8 changes: 4 additions & 4 deletions Source/Thunder/bridge.vcxproj
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Expand Up @@ -119,7 +119,7 @@
<FunctionLevelLinking>true</FunctionLevelLinking>
<IntrinsicFunctions>true</IntrinsicFunctions>
<SDLCheck>true</SDLCheck>
<PreprocessorDefinitions>APPLICATION_NAME=Thunder;__CORE_MESSAGING__;_CRT_SECURE_NO_WARNINGS;_WINDOWS;THREADPOOL_COUNT=4;HOSTING_COMPROCESS=comprocess.exe;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<PreprocessorDefinitions>APPLICATION_NAME=Thunder;__CORE_MESSAGING__;_CRT_SECURE_NO_WARNINGS;_WINDOWS;THREADPOOL_COUNT=4;HOSTING_COMPROCESS=comprocess.exe;THUNDER_POSTMORTEM_WORKERPOOL_SINK_DEFAULT=0;THUNDER_POSTMORTEM_CALLSTACK_SINK_DEFAULT=3;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<ConformanceMode>true</ConformanceMode>
<PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
<AdditionalIncludeDirectories>$(FrameworkPath)plugins;$(FrameworkPath);$(WindowsPath);$(WindowsPath)zlib;$(FrameworkPath)addons</AdditionalIncludeDirectories>
Expand All @@ -143,7 +143,7 @@
<WarningLevel>Level3</WarningLevel>
<Optimization>Disabled</Optimization>
<SDLCheck>true</SDLCheck>
<PreprocessorDefinitions>APPLICATION_NAME=Thunder;__CORE_MESSAGING__;_CRT_SECURE_NO_WARNINGS;_WINDOWS;THREADPOOL_COUNT=4;HOSTING_COMPROCESS=comprocess.exe;WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<PreprocessorDefinitions>APPLICATION_NAME=Thunder;__CORE_MESSAGING__;_CRT_SECURE_NO_WARNINGS;_WINDOWS;THREADPOOL_COUNT=4;HOSTING_COMPROCESS=comprocess.exe;THUNDER_POSTMORTEM_WORKERPOOL_SINK_DEFAULT=0;THUNDER_POSTMORTEM_CALLSTACK_SINK_DEFAULT=3;WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<ConformanceMode>true</ConformanceMode>
<PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
<AdditionalIncludeDirectories>$(FrameworkPath)plugins;$(FrameworkPath);$(WindowsPath);$(WindowsPath)zlib;$(FrameworkPath)addons</AdditionalIncludeDirectories>
Expand All @@ -165,7 +165,7 @@
<WarningLevel>Level3</WarningLevel>
<Optimization>Disabled</Optimization>
<SDLCheck>true</SDLCheck>
<PreprocessorDefinitions>APPLICATION_NAME=Thunder;__CORE_MESSAGING__;_CRT_SECURE_NO_WARNINGS;_WINDOWS;THREADPOOL_COUNT=4;HOSTING_COMPROCESS=comprocess.exe;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<PreprocessorDefinitions>APPLICATION_NAME=Thunder;__CORE_MESSAGING__;_CRT_SECURE_NO_WARNINGS;_WINDOWS;THREADPOOL_COUNT=4;HOSTING_COMPROCESS=comprocess.exe;THUNDER_POSTMORTEM_WORKERPOOL_SINK_DEFAULT=0;THUNDER_POSTMORTEM_CALLSTACK_SINK_DEFAULT=3;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<ConformanceMode>true</ConformanceMode>
<PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
<AdditionalIncludeDirectories>$(FrameworkPath)plugins;$(FrameworkPath);$(WindowsPath);$(WindowsPath)zlib;$(FrameworkPath)addons</AdditionalIncludeDirectories>
Expand All @@ -189,7 +189,7 @@
<FunctionLevelLinking>true</FunctionLevelLinking>
<IntrinsicFunctions>true</IntrinsicFunctions>
<SDLCheck>true</SDLCheck>
<PreprocessorDefinitions>APPLICATION_NAME=Thunder;__CORE_MESSAGING__;_CRT_SECURE_NO_WARNINGS;_WINDOWS;THREADPOOL_COUNT=4;HOSTING_COMPROCESS=comprocess.exe;WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<PreprocessorDefinitions>APPLICATION_NAME=Thunder;__CORE_MESSAGING__;_CRT_SECURE_NO_WARNINGS;_WINDOWS;THREADPOOL_COUNT=4;HOSTING_COMPROCESS=comprocess.exe;THUNDER_POSTMORTEM_WORKERPOOL_SINK_DEFAULT=0;THUNDER_POSTMORTEM_CALLSTACK_SINK_DEFAULT=3;WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<ConformanceMode>true</ConformanceMode>
<PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
<AdditionalIncludeDirectories>$(FrameworkPath)plugins;$(FrameworkPath);$(WindowsPath);$(WindowsPath)zlib;$(FrameworkPath)addons</AdditionalIncludeDirectories>
Expand Down
2 changes: 2 additions & 0 deletions Source/Thunder/params.config
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Expand Up @@ -13,6 +13,8 @@ systempath
extensionpath
proxystubpath
postmortempath
postmortemworkerpoolsink
postmortemcallstacksink
redirect
ethernetcard
communicator
Expand Down
2 changes: 2 additions & 0 deletions Tests/test_support/CMakeLists.txt
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Expand Up @@ -43,6 +43,8 @@ target_compile_definitions(${TARGET}
THREADPOOL_COUNT=${THREADPOOL_COUNT}
DEFAULT_SYSTEM_PATH="${SYSTEM_PATH}"
DEFAULT_PROXYSTUB_PATH="${PROXYSTUB_PATH}"
THUNDER_POSTMORTEM_WORKERPOOL_SINK_DEFAULT=0
THUNDER_POSTMORTEM_CALLSTACK_SINK_DEFAULT=3
)
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target_compile_options(${TARGET} PRIVATE -Wno-psabi)
Expand Down
2 changes: 2 additions & 0 deletions docs/introduction/config.md
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Expand Up @@ -31,6 +31,8 @@ This section documents the available options for Thunder. This is different from
| volatilepath | Directory to store volatile temporary data. <br /><br />Each plugin will have an associated directory underneath this corresponding to the callsign of the plugin | string | /tmp | /tmp/ |
| proxystubpath | Directory to search for the generated proxy stub libraries | string | - | /usr/lib/thunder/proxystubs |
| postmortempath | Directory to store debugging info (worker pool information, debug data) in the event of a plugin or server crash. <br /><br />If breakpad is found during build, will store breakpad mindumps here | string | /opt/minidumps | /opt/minidumps |
| postmortemworkerpoolsink | Controls where the WorkerPool JSON snapshot is written on crash. <br /><br />Allowed values: `FILE` (write ThunderInternals.json to `postmortempath`), `LOG` (emit via SYSLOG), `ALL` (both), `DISABLED` (skip) | string | FILE | FILE |
| postmortemcallstacksink | Controls where per-thread callstack output is written on crash. <br /><br />Allowed values: `FILE` (write ThunderInternals.txt to `postmortempath`), `LOG` (emit via SYSLOG), `ALL` (both), `DISABLED` (skip) | string | DISABLED | DISABLED |
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| communicator | Socket to listen for COM-RPC messages. Can be a filesystem path on Linux for a Unix domain socket, or a TCP socket. <br /><br />For unix sockets, the file permissions can be specified by adding a `|` followed by the numeric permissions | string | /tmp/communicator\|0777 | 127.0.0.1:4000 |
| redirect | Redirect incoming HTTP requests to the root Thunder URL to this address (please note it must contain the resource that is required e.g. index.html ) | string | http://127.0.0.1/Service/Controller/UI/index.html | http://127.0.0.1/Service/Controller/UI/index.html |
| idletime | Amount of time (in seconds) to wait before closing and cleaning up idle client connections. If no activity occurs over a connection for this time Thunder will close it. | integer | 180 | 180 |
Expand Down
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