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ClickHouse/tests/integration/test_disk_over_web_server
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Azat Khuzhin 7a5432feaa Fix possible SIGSEGV for web disks when file does not exists 
It can be triggered in multiple ways, either when file does not exists
and you are trying to create MergeTree table from web (that has special
code for UUID handling) or by simply OPTIMIZE TABLE FINAL for MergeTree
table that is located on web disk, in both cases you will get the
following:

<details>

<summary>stacktrace</summary>

    2022.10.28 14:08:40.631226 [ 6043 ] {6165bf5f-e76b-4bca-941c-7c7ff5e3b46b} <Trace> ContextAccess (default): Access granted: OPTIMIZE ON default.data_from_web
    2022.10.28 14:08:40.632017 [ 6043 ] {6165bf5f-e76b-4bca-941c-7c7ff5e3b46b} <Debug> default.data_from_web (a3e65e1f-5fd4-47ed-9dbd-307f2586b52d) (MergerMutator): Selected 1 parts from all_1_1_0 to all_1_1_0
    2022.10.28 14:08:40.632496 [ 6043 ] {6165bf5f-e76b-4bca-941c-7c7ff5e3b46b} <Trace> default.data_from_web (a3e65e1f-5fd4-47ed-9dbd-307f2586b52d): Trying to reserve 1.00 MiB using storage policy from min volume index 0
    2022.10.28 14:08:40.632752 [ 6043 ] {6165bf5f-e76b-4bca-941c-7c7ff5e3b46b} <Trace> DiskObjectStorage(DiskWebServer): Reserved 1.00 MiB on remote disk `web_disk`, having unreserved 16.00 EiB.
    2022.10.28 14:08:40.634155 [ 6043 ] {a3e65e1f-5fd4-47ed-9dbd-307f2586b52d::all_1_1_1} <Debug> MergeTask::PrepareStage: Merging 1 parts: from all_1_1_0 to all_1_1_0 into Compact
    2022.10.28 14:08:40.634498 [ 6043 ] {a3e65e1f-5fd4-47ed-9dbd-307f2586b52d::all_1_1_1} <Trace> WebObjectStorage: Loading metadata for directory: http://127.0.0.1:8080/store/a3e/a3e65e1f-5fd4-47ed-9dbd-307f2586b52d/tmp_merge_all_1_1_1
    2022.10.28 14:08:40.635025 [ 6043 ] {a3e65e1f-5fd4-47ed-9dbd-307f2586b52d::all_1_1_1} <Trace> DiskWeb: Adding directory: store/a3e/a3e65e1f-5fd4-47ed-9dbd-307f2586b52d/tmp_merge_all_1_1_1/
    2022.10.28 14:08:40.635355 [ 6043 ] {a3e65e1f-5fd4-47ed-9dbd-307f2586b52d::all_1_1_1} <Trace> ReadWriteBufferFromHTTP: Sending request to http://127.0.0.1:8080/store/a3e/a3e65e1f-5fd4-47ed-9dbd-307f2586b52d/tmp_merge_all_1_1_1/.index
    2022.10.28 14:08:40.639618 [ 6043 ] {a3e65e1f-5fd4-47ed-9dbd-307f2586b52d::all_1_1_1} <Trace> DiskWeb: Cannot load disk metadata. Error: Code: 86. DB::Exception: Received error from remote server /store/a3e/a3e65e1f-5fd4-47ed-9dbd-307f2586b52d/tmp_merge_all_1_1_1/.index. HTTP status code: 404 Not Found, body: <!doctype html><html><head><title>404 Not Found</title><style>
    body { background-color: #fcfcfc; color: #333333; margin: 0; padding:0; }
    h1 { font-size: 1.5em; font-weight: normal; background-color: #9999cc; min-height:2em; line-height:2em; border-bottom: 1px inset black; margin: 0; }
    h1, p { padding-left: 10px; }
    code.url { background-color: #eeeeee; font-family:monospace; padding:0 2px;}
    </style>
    </head><body><h1>Not Found</h1><p>The requested resource <code class="url">/store/a3e/a3e65e1f-5fd4-47ed-9dbd-307f2586b52d/tmp_merge_all_1_1_1/.index</code> was not found on this server.</p></body></html>: while loading disk metadata. (RECEIVED_ERROR_FROM_REMOTE_IO_SERVER) (version 22.11.1.1)
    2022.10.28 14:08:40.640527 [ 5488 ] {} <Trace> BaseDaemon: Received signal 11
    2022.10.28 14:08:40.641529 [ 9027 ] {} <Fatal> BaseDaemon: ########################################
    2022.10.28 14:08:40.642759 [ 9027 ] {} <Fatal> BaseDaemon: (version 22.11.1.1, build id: 12145DA78CE5E9EBB10A034177FAE5967EF81A4A) (from thread 6043) (query_id: a3e65e1f-5fd4-47ed-9dbd-307f2586b52d::all_1_1_1) (query: optimize table data_from_web final) Received signal Segmentation fault (11)
    2022.10.28 14:08:40.643260 [ 9027 ] {} <Fatal> BaseDaemon: Address: NULL pointer. Access: read. Unknown si_code.
    2022.10.28 14:08:40.643769 [ 9027 ] {} <Fatal> BaseDaemon: Stack trace: 0x7ffff416c0f2 0x7ffff7cd1ca8 0x7ffff679ae5e 0x7fffd52e7906 0x7fffd50c65aa 0x7fffca7a0d42 0x7fffcaee79ec 0x7fffcaf242f8 0x7fffcaf242b5 0x7fffcaf2427d 0x7fffcaf24255 0x7fffcaf2421d 0x7ffff65c3686 0x7ffff65c2295 0x7fffcaeee2a9 0x7fffcaef2c43 0x7fffcaee3c0e 0x7fffcc4a7851 0x7fffcc4a768f 0x7fffcc4abb2d 0x7fffcfdce828 0x7fffd03e3eaa 0x7fffd03dfe3b 0x7fffc8ec42d4 0x7fffc8ed51d2 0x7ffff4bdd839 0x7ffff4bde0a8 0x7ffff48ab261 0x7ffff48a769a 0x7ffff48a6335 0x7ffff409f8fd 0x7ffff4121a60
    2022.10.28 14:08:40.644411 [ 9027 ] {} <Fatal> BaseDaemon: 4. ? @ 0x7ffff416c0f2 in ?
    2022.10.28 14:08:40.676390 [ 9027 ] {} <Fatal> BaseDaemon: 5. /src/ch/clickhouse/src/Common/StringUtils/StringUtils.cpp:9: detail::startsWith(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&, char const*, unsigned long) @ 0x1ca8 in /src/ch/clickhouse/.cmake/src/Common/StringUtils/libstring_utilsd.so
    2022.10.28 14:08:40.730727 [ 9027 ] {} <Fatal> BaseDaemon: 6. /src/ch/clickhouse/src/Common/StringUtils/StringUtils.h:19: startsWith(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&) @ 0x59ae5e in /src/ch/clickhouse/.cmake/src/libclickhouse_common_iod.so
    2022.10.28 14:08:40.923955 [ 9027 ] {} <Fatal> BaseDaemon: 7. /src/ch/clickhouse/src/Disks/ObjectStorages/Web/MetadataStorageFromStaticFilesWebServer.cpp:58: DB::MetadataStorageFromStaticFilesWebServer::exists(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&) const @ 0x6e7906 in /src/ch/clickhouse/.cmake/src/libdbmsd.so
    2022.10.28 14:08:41.291996 [ 9027 ] {} <Fatal> BaseDaemon: 8. /src/ch/clickhouse/src/Disks/ObjectStorages/DiskObjectStorage.cpp:181: DB::DiskObjectStorage::exists(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&) const @ 0x4c65aa in /src/ch/clickhouse/.cmake/src/libdbmsd.so
    2022.10.28 14:08:41.704697 [ 9027 ] {} <Fatal> BaseDaemon: 9. /src/ch/clickhouse/src/Storages/MergeTree/DataPartStorageOnDisk.cpp:74: DB::DataPartStorageOnDisk::exists() const @ 0xda0d42 in /src/ch/clickhouse/.cmake/src/libclickhouse_storages_mergetreed.so
    2022.10.28 14:08:43.032459 [ 9027 ] {} <Fatal> BaseDaemon: 10. /src/ch/clickhouse/src/Storages/MergeTree/MergeTask.cpp:147: DB::MergeTask::ExecuteAndFinalizeHorizontalPart::prepare() @ 0x14e79ec in /src/ch/clickhouse/.cmake/src/libclickhouse_storages_mergetreed.so
    ...
    Segmentation fault (core dumped)

</details>

Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
2022-10-28 15:15:49 +02:00
..
configs Remove one line from XML, because we do not care 2022-08-28 02:44:02 +02:00
__init__.py Add test 2021-06-13 19:38:17 +00:00
test.py Fix possible SIGSEGV for web disks when file does not exists 2022-10-28 15:15:49 +02:00