When the filter is trying to be created. it try to get the clusterManager reference from ServerFactoryContext but it seems it is not available at that moment the pointer is null. not initialized at that moment.

[2024-03-26 12:35:53.520][144854083][critical][assert] [source/server/server.cc:144] assert failure: config_.clusterManager() != nullptr.
[2024-03-26 12:35:53.520][144854083][critical][backtrace] [./source/server/backtrace.h:104] Caught Abort trap: 6, suspect faulting address 0x182652a60
[2024-03-26 12:35:53.520][144854083][critical][backtrace] [./source/server/backtrace.h:91] Backtrace (use tools/stack_decode.py to get line numbers):
[2024-03-26 12:35:53.520][144854083][critical][backtrace] [./source/server/backtrace.h:92] Envoy version: 22e6a78/1.30.0-dev/Modified/DEBUG/BoringSSL
[2024-03-26 12:35:53.541][144854083][critical][backtrace] [./source/server/backtrace.h:96] #0: Envoy::SignalAction::sigHandler() [0x10c6dc9b8]
[2024-03-26 12:35:53.541][144854083][critical][backtrace] [./source/server/backtrace.h:96] #1: _sigtramp [0x1826bb584]
[2024-03-26 12:35:53.541][144854083][critical][backtrace] [./source/server/backtrace.h:96] #2: pthread_kill [0x18268ac20]
[2024-03-26 12:35:53.541][144854083][critical][backtrace] [./source/server/backtrace.h:96] #3: abort [0x182597a20]
[2024-03-26 12:35:53.545][144854083][critical][backtrace] [./source/server/backtrace.h:96] #4: Envoy::Server::InstanceBase::clusterManager() [0x10a3f5bcc]
[2024-03-26 12:35:53.547][144854083][critical][backtrace] [./source/server/backtrace.h:96] #5: Envoy::Server::ServerFactoryContextImpl::clusterManager() [0x10a374710]
[2024-03-26 12:35:53.548][144854083][critical][backtrace] [./source/server/backtrace.h:96] #6: Envoy::Extensions::HttpFilters::Wasm::FilterConfig::FilterConfig()

To make it work I just mock the clusterManager and could create a policy to add a header as upstream filter.
I have to add a check to not make the clearCacheRoute, I guess this has no meaning as upstream. Probably other checks are needed in the code.
Due to mock the clusterManager, I understand some functionality is not available like making calls to any server. not sure if has sens in an upstream filter.

I don't know how we could solve the clusterManager issue.

More Context in the stack

[2024-03-26 12:35:53.509][144854083][debug][misc] [source/common/network/dns_resolver/dns_factory_util.cc:39] create Apple DNS resolver type: envoy.network.dns_resolver.apple in MacOS.
[2024-03-26 12:35:53.509][144854083][debug][misc] [source/common/network/dns_resolver/dns_factory_util.cc:75] create DNS resolver type: envoy.network.dns_resolver.apple
[2024-03-26 12:35:53.519][144854083][debug][config] [./source/common/http/filter_chain_helper.h:111] upstream http filter #0
[2024-03-26 12:35:53.520][144854083][critical][assert] [source/server/server.cc:144] assert failure: config_.clusterManager() != nullptr.
[2024-03-26 12:35:53.520][144854083][critical][backtrace] [./source/server/backtrace.h:104] Caught Abort trap: 6, suspect faulting address 0x182652a60
[2024-03-26 12:35:53.520][144854083][critical][backtrace] [./source/server/backtrace.h:91] Backtrace (use tools/stack_decode.py to get line numbers):
[2024-03-26 12:35:53.520][144854083][critical][backtrace] [./source/server/backtrace.h:92] Envoy version: 22e6a78/1.30.0-dev/Modified/DEBUG/BoringSSL
[2024-03-26 12:35:53.541][144854083][critical][backtrace] [./source/server/backtrace.h:96] #0: Envoy::SignalAction::sigHandler() [0x10c6dc9b8]
[2024-03-26 12:35:53.541][144854083][critical][backtrace] [./source/server/backtrace.h:96] #1: _sigtramp [0x1826bb584]
[2024-03-26 12:35:53.541][144854083][critical][backtrace] [./source/server/backtrace.h:96] #2: pthread_kill [0x18268ac20]
[2024-03-26 12:35:53.541][144854083][critical][backtrace] [./source/server/backtrace.h:96] #3: abort [0x182597a20]
[2024-03-26 12:35:53.545][144854083][critical][backtrace] [./source/server/backtrace.h:96] #4: Envoy::Server::InstanceBase::clusterManager() [0x10a3f5bcc]
[2024-03-26 12:35:53.547][144854083][critical][backtrace] [./source/server/backtrace.h:96] #5: Envoy::Server::ServerFactoryContextImpl::clusterManager() [0x10a374710]
[2024-03-26 12:35:53.548][144854083][critical][backtrace] [./source/server/backtrace.h:96] #6: Envoy::Extensions::HttpFilters::Wasm::FilterConfig::FilterConfig() [0x10553fe64]
[2024-03-26 12:35:53.550][144854083][critical][backtrace] [./source/server/backtrace.h:96] #7: Envoy::Extensions::HttpFilters::Wasm::FilterConfig::FilterConfig() [0x1055403d8]
[2024-03-26 12:35:53.551][144854083][critical][backtrace] [./source/server/backtrace.h:96] #8: std::__1::construct_at[abi:v160006]<>() [0x10553ac3c]
[2024-03-26 12:35:53.553][144854083][critical][backtrace] [./source/server/backtrace.h:96] #9: std::__1::allocator_traits<>::construct[abi:v160006]<>() [0x10553aa54]
[2024-03-26 12:35:53.555][144854083][critical][backtrace] [./source/server/backtrace.h:96] #10: std::__1::__shared_ptr_emplace<>::__shared_ptr_emplace[abi:v160006]<>() [0x10553a978]
[2024-03-26 12:35:53.557][144854083][critical][backtrace] [./source/server/backtrace.h:96] #11: std::__1::__shared_ptr_emplace<>::__shared_ptr_emplace[abi:v160006]<>() [0x10553a658]
[2024-03-26 12:35:53.558][144854083][critical][backtrace] [./source/server/backtrace.h:96] #12: std::__1::allocate_shared[abi:v160006]<>() [0x10553a558]
[2024-03-26 12:35:53.560][144854083][critical][backtrace] [./source/server/backtrace.h:96] #13: std::__1::make_shared[abi:v160006]<>() [0x1055397b8]
[2024-03-26 12:35:53.561][144854083][critical][backtrace] [./source/server/backtrace.h:96] #14: Envoy::Extensions::HttpFilters::Wasm::WasmFilterConfig::createFilterFactoryFromProtoTyped() [0x105539718]
[2024-03-26 12:35:53.563][144854083][critical][backtrace] [./source/server/backtrace.h:96] #15: Envoy::Extensions::HttpFilters::Common::DualFactoryBase<>::createFilterFactoryFromProto() [0x105539cdc]
[2024-03-26 12:35:53.565][144854083][critical][backtrace] [./source/server/backtrace.h:96] #16: Envoy::Http::FilterChainHelper<>::processFilter() [0x10b0bed64]
[2024-03-26 12:35:53.567][144854083][critical][backtrace] [./source/server/backtrace.h:96] #17: Envoy::Http::FilterChainHelper<>::processFilters() [0x10b054b38]
[2024-03-26 12:35:53.569][144854083][critical][backtrace] [./source/server/backtrace.h:96] #18: Envoy::Upstream::ClusterInfoImpl::ClusterInfoImpl() [0x10b0507a8]
[2024-03-26 12:35:53.571][144854083][critical][backtrace] [./source/server/backtrace.h:96] #19: Envoy::Upstream::ClusterInfoImpl::ClusterInfoImpl() [0x10b0550b8]
[2024-03-26 12:35:53.572][144854083][critical][backtrace] [./source/server/backtrace.h:96] #20: Envoy::Upstream::ClusterImplBase::ClusterImplBase() [0x10b056550]
[2024-03-26 12:35:53.574][144854083][critical][backtrace] [./source/server/backtrace.h:96] #21: Envoy::Upstream::BaseDynamicClusterImpl::?::ClusterImplBase() [0x1044ba19c]
[2024-03-26 12:35:53.576][144854083][critical][backtrace] [./source/server/backtrace.h:96] #22: Envoy::Upstream::StrictDnsClusterImpl::StrictDnsClusterImpl() [0x1045393cc]
[2024-03-26 12:35:53.577][144854083][critical][backtrace] [./source/server/backtrace.h:96] #23: Envoy::Upstream::StrictDnsClusterImpl::StrictDnsClusterImpl() [0x104539fac]
[2024-03-26 12:35:53.579][144854083][critical][backtrace] [./source/server/backtrace.h:96] #24: std::__1::construct_at[abi:v160006]<>() [0x104547a70]
[2024-03-26 12:35:53.580][144854083][critical][backtrace] [./source/server/backtrace.h:96] #25: std::__1::allocator_traits<>::construct[abi:v160006]<>() [0x10454785c]
[2024-03-26 12:35:53.582][144854083][critical][backtrace] [./source/server/backtrace.h:96] #26: std::__1::__shared_ptr_emplace<>::__shared_ptr_emplace[abi:v160006]<>() [0x104547778]
[2024-03-26 12:35:53.583][144854083][critical][backtrace] [./source/server/backtrace.h:96] #27: std::__1::__shared_ptr_emplace<>::__shared_ptr_emplace[abi:v160006]<>() [0x104547450]
[2024-03-26 12:35:53.585][144854083][critical][backtrace] [./source/server/backtrace.h:96] #28: std::__1::allocate_shared[abi:v160006]<>() [0x104547348]
[2024-03-26 12:35:53.586][144854083][critical][backtrace] [./source/server/backtrace.h:96] #29: std::__1::make_shared[abi:v160006]<>() [0x10453ace0]
[2024-03-26 12:35:53.588][144854083][critical][backtrace] [./source/server/backtrace.h:96] #30: Envoy::Upstream::StrictDnsClusterFactory::createClusterImpl() [0x10453abb4]
[2024-03-26 12:35:53.590][144854083][critical][backtrace] [./source/server/backtrace.h:96] #31: Envoy::Upstream::ClusterFactoryImplBase::create() [0x10b0f53d0]
[2024-03-26 12:35:53.591][144854083][critical][backtrace] [./source/server/backtrace.h:96] #32: Envoy::Upstream::ClusterFactoryImplBase::create() [0x10b0f4a38]
[2024-03-26 12:35:53.593][144854083][critical][backtrace] [./source/server/backtrace.h:96] #33: Envoy::Upstream::ProdClusterManagerFactory::clusterFromProto() [0x10a5a6e50]
[2024-03-26 12:35:53.595][144854083][critical][backtrace] [./source/server/backtrace.h:96] #34: Envoy::Upstream::ClusterManagerImpl::loadCluster() [0x10a58c7c0]
[2024-03-26 12:35:53.597][144854083][critical][backtrace] [./source/server/backtrace.h:96] #35: Envoy::Upstream::ClusterManagerImpl::init() [0x10a58a9ec]
[2024-03-26 12:35:53.599][144854083][critical][backtrace] [./source/server/backtrace.h:96] #36: Envoy::Upstream::ProdClusterManagerFactory::clusterManagerFromProto() [0x10a5a3a3c]
[2024-03-26 12:35:53.600][144854083][critical][backtrace] [./source/server/backtrace.h:96] #37: Envoy::Server::Configuration::MainImpl::initialize() [0x10bc37e9c]
[2024-03-26 12:35:53.602][144854083][critical][backtrace] [./source/server/backtrace.h:96] #38: Envoy::Server::InstanceBase::initializeOrThrow() [0x10a3fdae0]
[2024-03-26 12:35:53.604][144854083][critical][backtrace] [./source/server/backtrace.h:96] #39: Envoy::Server::InstanceBase::initialize() [0x10a3f886c]
[2024-03-26 12:35:53.606][144854083][critical][backtrace] [./source/server/backtrace.h:96] #40: Envoy::createFunction()::$_1::operator()() [0x10a3011a0]

Request variables

Key	Value
ref	e8a49ecda091d58901e690cdb2c654cf518c933c
sha	357df68
pr	33119
base-sha	2d368c3
actor	@juanmolle
message	POC wasm as upstream filter...
started	1711468293.203499
target-branch	main
trusted	false

Container image/s (as used in this CI run)

Envoy version (as used in this CI run)