Chun-Hung Hsiao created MESOS-8875:
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Summary: `leveldb::PosixEnv::DeleteFile()` can segfault.
Key: MESOS-8875
URL: https://issues.apache.org/jira/browse/MESOS-8875
Project: Mesos
Issue Type: Bug
Affects Versions: 1.6.0
Reporter: Chun-Hung Hsiao
Assignee: Benjamin Bannier
Attachments: LevelDB-1.txt, LevelDB-2.txt, LevelDB-3.txt
Patch https://reviews.apache.org/r/66310/ instantiate a {{LevelDBStorage}} for
the registrar of the agent-side resource provider manager. This change seems to
introduce flaky segfaults to various tests, including
{{MasterAPITest.Subscribe}}, {{MasterTest.UnacknowledgedTerminalTask}} and
{{ReconciliationTest.ImplicitTerminalTask}}. The segfault usually happens after
successfully attached the virtual path of a launched default executor:
{noformat}
I0502 21:47:31.329772 4511 paths.cpp:745] Creating sandbox
'/tmp/ContentType_MasterAPITest_Subscribe_1_HzYh4s/slaves/82b400f9-82ed-4fdc-9f34-8c652dc502a8-S0/frameworks/82b400f9-82ed-4fdc-9f34-8c652dc502a8-0000/executors/default/runs/398c5e60-5141-43f0-9856-98c05d501b33'
for user 'root'
I0502 21:47:31.330245 4511 slave.cpp:8964] Launching executor 'default' of
framework 82b400f9-82ed-4fdc-9f34-8c652dc502a8-0000 with resources [] in work
directory
'/tmp/ContentType_MasterAPITest_Subscribe_1_HzYh4s/slaves/82b400f9-82ed-4fdc-9f34-8c652dc502a8-S0/frameworks/82b400f9-82ed-4fdc-9f34-8c652dc502a8-0000/executors/default/runs/398c5e60-5141-43f0-9856-98c05d501b33'
I0502 21:47:31.330423 4511 slave.cpp:3044] Queued task
'7e968920-a780-4265-9e4b-e56e091ff27e' for executor 'default' of framework
82b400f9-82ed-4fdc-9f34-8c652dc502a8-0000
I0502 21:47:31.330549 4511 slave.cpp:3523] Launching container
398c5e60-5141-43f0-9856-98c05d501b33 for executor 'default' of framework
82b400f9-82ed-4fdc-9f34-8c652dc502a8-0000
I0502 21:47:31.330747 4515 slave.cpp:1008] Successfully attached
'/tmp/ContentType_MasterAPITest_Subscribe_1_HzYh4s/slaves/82b400f9-82ed-4fdc-9f34-8c652dc502a8-S0/frameworks/82b400f9-82ed-4fdc-9f34-8c652dc502a8-0000/executors/default/runs/398c5e60-5141-43f0-9856-98c05d501b33'
to virtual path
'/tmp/ContentType_MasterAPITest_Subscribe_1_HzYh4s/slaves/82b400f9-82ed-4fdc-9f34-8c652dc502a8-S0/frameworks/82b400f9-82ed-4fdc-9f34-8c652dc502a8-0000/executors/default/runs/latest'
I0502 21:47:31.330814 4515 slave.cpp:1008] Successfully attached
'/tmp/ContentType_MasterAPITest_Subscribe_1_HzYh4s/slaves/82b400f9-82ed-4fdc-9f34-8c652dc502a8-S0/frameworks/82b400f9-82ed-4fdc-9f34-8c652dc502a8-0000/executors/default/runs/398c5e60-5141-43f0-9856-98c05d501b33'
to virtual path
'/frameworks/82b400f9-82ed-4fdc-9f34-8c652dc502a8-0000/executors/default/runs/latest'
I0502 21:47:31.331126 4511 slave.cpp:1008] Successfully attached
'/tmp/ContentType_MasterAPITest_Subscribe_1_HzYh4s/slaves/82b400f9-82ed-4fdc-9f34-8c652dc502a8-S0/frameworks/82b400f9-82ed-4fdc-9f34-8c652dc502a8-0000/executors/default/runs/398c5e60-5141-43f0-9856-98c05d501b33'
to virtual path
'/tmp/ContentType_MasterAPITest_Subscribe_1_HzYh4s/slaves/82b400f9-82ed-4fdc-9f34-8c652dc502a8-S0/frameworks/82b400f9-82ed-4fdc-9f34-8c652dc502a8-0000/executors/default/runs/398c5e60-5141-43f0-9856-98c05d501b33'
*** Aborted at 1525297651 (unix time) try "date -d @1525297651" if you are
using GNU date ***
I0502 21:47:31.331786 4515 executor.cpp:192] Version: 1.6.0
W0502 21:47:31.331804 4515 process.cpp:2824] Attempted to spawn already
running process [email protected]:37498
I0502 21:47:31.332619 4515 executor.cpp:414] Connected with the agent
I0502 21:47:31.332749 4515 executor.cpp:311] Sending SUBSCRIBE call to
http://172.16.10.128:37498/slave(945)/api/v1/executor
PC: @ 0x7f9239ecd0ed __GI_getenv
*** SIGSEGV (@0x171) received by PID 13317 (TID 0x7f922de28700) from PID 369;
stack trace: ***
@ 0x7f922cca2155 (unknown)
@ 0x7f922cca6e41 (unknown)
@ 0x7f922cc9a678 (unknown)
@ 0x7f923ae935e0 (unknown)
@ 0x7f9239ecd0ed __GI_getenv
@ 0x7f9239ec4d61 __dcigettext
@ 0x7f9239f1ba9e __GI___strerror_r
@ 0x7f9239f1b9df strerror
@ 0x7f923dde4e23 leveldb::(anonymous namespace)::IOError()
@ 0x7f923dde5832 leveldb::(anonymous namespace)::PosixEnv::DeleteFile()
@ 0x7f923dde1628 leveldb::BuildTable()
@ 0x7f923ddbd5b4 leveldb::DBImpl::WriteLevel0Table()
@ 0x7f923ddbf6c8 leveldb::DBImpl::CompactMemTable()
@ 0x7f923ddc0756 leveldb::DBImpl::BackgroundCompaction()
@ 0x7f923ddc1172 leveldb::DBImpl::BackgroundCall()
@ 0x7f923dde55cb leveldb::(anonymous
namespace)::PosixEnv::BGThreadWrapper()
@ 0x7f923ae8be25 start_thread
@ 0x7f9239f8d34d __clone
{noformat}
leveldb maintains a global singleton of {{PosixEnv}}, whose {{DeleteFile()}}
callback sometimes fails to unlink a {{ldb}} file, and it uses {{strerror()}}
to report the error, which seems to call {{getenv}}, and this increase the
likelihood of some setenv-getenv race described in
https://issues.apache.org/jira/browse/MESOS-2407.
It is worth investigating why {{DeleteFile()}} fails.
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