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https://issues.apache.org/jira/browse/TS-1590?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bryan Call updated TS-1590:
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Assignee: Leif Hedstrom (was: Bryan Call)
> use_remap_processor crashes if share_server_sessions = 2
> --------------------------------------------------------
>
> Key: TS-1590
> URL: https://issues.apache.org/jira/browse/TS-1590
> Project: Traffic Server
> Issue Type: Bug
> Components: HTTP
> Affects Versions: 3.3.0
> Reporter: Conan Wang
> Assignee: Leif Hedstrom
> Priority: Critical
> Labels: Crash
> Fix For: 5.1.0
>
>
> easy to reproduce:
> {code}
> CONFIG proxy.config.remap.use_remap_processor INT 1 (default is 0)
> CONFIG proxy.config.http.share_server_sessions INT 2 (0, 1 will be ok)
> {code}
> {code}
> Program received signal EXC_BAD_ACCESS, Could not access memory.
> Reason: KERN_INVALID_ADDRESS at address: 0x0000000000001210
> [Switching to process 8927 thread 0x1a03]
> 0x00000001000ead15 in _acquire_session (bucket=0x11c0, ip=0x6713138,
> hostname_hash=@0xb06915d0, sm=0x6712aa0) at HttpSessionManager.cc:191
> (gdb) bt
> #0 0x00000001000ead15 in _acquire_session (bucket=0x11c0, ip=0x6713138,
> hostname_hash=@0xb06915d0, sm=0x6712aa0) at HttpSessionManager.cc:191
> #1 0x00000001000eb366 in HttpSessionManager::acquire_session
> (this=0x100445e60, cont=0x6712aa0, ip=0x6713138, hostname=0x4ebc19
> "127.0.0.1", ua_session=0x2a88980, sm=0x6712aa0) at HttpSessionManager.cc:274
> #2 0x0000000100105c29 in HttpSM::do_http_server_open (this=0x6712aa0,
> raw=false) at HttpSM.cc:4384
> ......
> (gdb) p this_ethread()->l1_hash
> $2 = (SessionBucket *) 0x0
> (gdb) p this_ethread()->event_types
> $3 = 2 (ET_REMAP)
> {code}
> Using separate remap processor is a hidden option, and I enable it by
> accident.. (Does anyone use it in prod?)
> I noticed HttpSM::do_http_server_open is always executed by the remap
> processer ethread (because of
> action.continuation->handleEvent(EVENT_REMAP_COMPLETE, NULL), correct me if
> wrong). While the remap thread was not initialized as ET_NET and has no
> l1_hash, server session lookup in this ET_REMAP thread will crash.
> I didn't find a quick way to make HttpSM handling EVENT_REMAP_COMPLETE on
> ET_NET. So a fast workaround would be falling back to global server
> connection when use_remap_processor.
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