Sphinx insert seems truncated but no errors found

问题

I have a Sphinx-configuration where I can't succeed to insert some contents of documents. I have a string of almost 6MB, which I can't insert completely. I tested this by querying back the inserted value and I get back only a part of the entire content. Lets say around 0.8MB.

The configuration of Sphinx:

index RTTest
{
  type            = rt
  path            = /mnt/data001/RTTest
  rt_field        = Name
  rt_field        = Extension
  rt_field        = Content
  rt_field        = Tags
  rt_attr_uint    = Reference
  rt_attr_uint    = FileSize
  rt_attr_uint    = LastModified
  rt_attr_uint    = LastModifiedYear
  rt_attr_uint    = LastModifiedMonth
  rt_attr_uint    = LastModifiedDay
  stored_fields   = Content
}

searchd
{
  listen                = 9306:mysql41
  log                   = /var/log/sphinxsearch/searchd.log
  read_timeout          = 100
  max_children          = 30
  pid_file              = /var/run/searchd.pid
  max_packet_size       = 128M
  binlog_path           = /mnt/data001
}

I have already checked the logging at /var/log/sphinxsearch/searchd.log. No errors, warnings or notices there... Neither there are errors thrown during the insert. I use the MySQL connector to connect to Sphinx as you can see in the configuration. I tested this by creating a syntax error and the error is successfully catched.

So, I have a situation where I can't insert the full content, however Sphinx nor MySQL throw or log any errors? Besides, I have been able to reproduce this issue on two other machines with an empty index using the same configuration?

What am I doing wrong?

My environment is Ubuntu 16.04LTS, Sphinx 2.2.9-id64-release and MySQL 5.7.22-0ubuntu0.16.04.1

EDIT: Link to the file containing the insert command and the queried value

UPDATE: I have updated to Sphinx3 and changed the rt_attr_field for docstore (stored_fields) directive. I have rebuild the index and when I'm inserting new content to the index, it still fails to insert the entire document content. I have an example below with both the query and the returned value:

INSERT INTO RTTest(id, Name, Extension, Content, Tags, Reference, FileSize, LastModified, LastModifiedYear, LastModifiedMonth, LastModifiedDay) VALUES(1774, 'DwQ2vTcCx1lfeDU% DwQ0tywFxw%% DAssrSQU2w%% VFpz7WtXmnUHLGt2', '7A5A5Q', 'FAUsvCA% FAUsvCA% BA8s Fg8sqy4D BA8s9jcJzE5TXysiVnBiOjr8YRE% AB0% DwQ2vTcCx1lfeDU% DwQ0tywFxw%% DAssrSQU2w%% VFpz7Q%% DgM% AgMjtiQ% Ag84vQ%% UFo% CwMsrTEDzA%% DgsmvCAI EQ8% CAMnrA%% AgUtqg%% CwUlvSs% BA8uuTYSx0Q% EA8woioDyQ%% EAss Eg8wvTYH AQ81vSAV1g%% CQc% Aw8s BwssrCQK Dx4ntTY% Eg8% BQInuy4DzA%% Cwsjqg%% AgM2 EQsx Cw82 Aw8s FA8mvSs% Agsjqg%% CQQ4vQ%% FQE3 Ags2uQ%% CAMnrA%% BQUwqiAF1g%% Cw8nqg%% DwQ% Dg82 FRMxrCADzw%% FR4ttiE% HAMotg%% Axg% EAUtqg%% Aw8s Fgsjqg%% CRgmvTcV Ag84vQ%% Dx4ntTY% FRMxrCALw15fbDgv CAMnrA%% AQ8xvSkDwV5Teikj DwE% HAsu Axg0tyoU HAUwvyAI Ags2 Ag84vQ%% CRo% Ag8% DwQ0tywFxw%% EAss AA8gqjAH0EM% AQ8hqiACy15Teikj AQsjrA%% EQUwvCAI HAsu DwQ% Ag8% BAMotCQBxw%% EAsx CRolvSsJz09Y EQUwvCAI AxIhrTYD0Q%% EAUtqg%% Dg82 CQQlvSgHyQ%% C0Q09iI% BA8s ABgttQ%% AgMjtiQ% AgMntCwV0U9Y AgMjtiRIxkNTczI0S2ZnH51RoVnYBIbuBLY% FQ8srA%% Eh8nqyEH2w%% AA8gqjAH0FM% V10% VFpz7Q%% VVB27Q%% Fgc% EgU% DwQ2vTcCx1lfeDU% FgYn Fg8sqy4D BQk% FAUsvCA% BA8s Fg8sqy4D FR8gsiAF1g%% AB0% DwQ2vTcCx1lfeDU% DwQ0tywFxw%% DAssrSQU2w%% VFpz7Q%% DQMsvA%% FA8luTcC0Q%% Cw82 EBgrvSsCx0ZfdTAi ARgtvTEDzA%% AgMjtiQ% AgMntCwV0U9Y FQ8j ABgnsSIO1g%% DwcytzcS CRonqiQSzVg% FAUqtCwB CA8mvTcKw0RS BEQ0 EQ8ntiQ% VFpy BB8rtCEPzE0% EQ8ntiQ% VV5w EgU1vTc% Bw%% V1gktA%% VVpz6g%% CAA% FAU2rCAUxktb Eg8u VVs% V1o% VFI% VF8% VFhx AAs6 VVs% V1o% VFI% VF8% VF5w AgMjtiRIxkNTczI0S2ZnH51RoVnYBIbuBLY% ER019jcJykZfeHUkV24% ABgttQ%% Eg8wvTYH FQsgtyk% Eg8wvTYHjFlXfTQreGpnK32n1;CdScZYKYkp9ov4zQ%% FQ8srA%% CwUsvCQf AA8gqjAH0FM% V1w% VFpz7Q%% UlBy4A%% Fgc% EgU% AgMjtiQ% AgMntCwV0U9Y FR8gsiAF1g%% AB0% DwQ2vTcCx1lfeDU% DwQ0tywFxw%% DAssrSQU2w%% VFpz7Q%% DgM% AgMjtiQ% Dw%% Dgs0vQ%% FRotsyAI EQM2sA%% DAsxtys% BwQm Dg8% Dxk% Bx0jqiA% EgIjrA%% Dw%% AgU% CAU2 Dgs0vQ%% EQ8gqywSxw%% BwkhvTYV CQQ% 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CQQ% VVpt6HQ% EQ8nsw%% Vlw% VUckvSc% VFhx63dQlh0% Xg%% Xg%% VUckvSc% VFhx63dRlR0% Vw%% Vw%% VUckvSc% VFhx63dQlhs% Vw%% Vw%% VUckvSc% VFhx63dRkBM% VA%% VA%% VUckvSc% VFhx63dRlRo% Vw%% Vw%% VUckvSc% VFhx63dRkRk% Vw%% Vw%% VUckvSc% VFhx63dQkRIdLWl0CzE;a7M% VA%% VUckvSc% VFhx63dRlBIdLWl0CzE_azw% VA%% VUckvSc% VFhx63dRlxw% Vw%% VUckvSc% VFhx63FUkRo% Vw%% VUckvSc% VFhx63dRlxk% Vw%% VUckvSc% VFhx63dQlxodLWl0CzE_bkE% VA%% UkckvSc% VFhx63FUkRM% Ug%% UkckvSc% VFhx63ZelxI% Ug%% UkckvSc% VFhx63dQlh4% VQ%% UkckvSc% VFhx63dQlh8% VQ%% UkckvSc% FA82uykPwUJP V1o% V1o% V1o% UkckvSc% FA826HFWkBsD V1o% VV8% V1o% U0ckvSc% FA826ndVkxoOJmw% VFo% U1o% U1o% UEckvSc% VFhx63JSlB8% Ug%% UEckvSc% VFhx631Vlx0% Ug%% UEckvSc% VFhx631Vlx8dLWl0CzQ9ae8% Ug%% UEckvSc% VFhx631VlBo% Ug%% UEckvSc% VFhx63xXkR0% Ug%% UEckvSc% VFhx631VlxM% Ug%% UEckvSc% VFhx631VlB4% VA%% UEckvSc% VFhx631Vlxw% Ug%% UEckvSc% VFhx63xXkRw% Ug%% UEckvSc% VFhx7HRRkBk% VQ%% UEckvSc% VFhx7HRRkB0% VA%% UEckvSc% VFhx7HRRkB8% Uw%% UEckvSc% FA826ndVkxoOJmw% Ul8% Ulo% UFo% EQ8nsw%% UQ%% V1pvviAE VFhx7HRSlxw% UQ%% UQ%% V1pvviAE VFhx7HRRkxw% VA%% Uw%% V1pvviAE VFhx7HRSmh8% VA%% Uw%% V1pvviAE VFhx7HRRkBo% Vw%% Ug%% V1pvviAE VFhx7HRQkRg% Vw%% Ug%% V1pvviAE VFhx7HRSlx4% Vw%% Ug%% V1pvviAE VFhx7HRRkxM% VQ%% V1g% V1pvviAE VFhx7HRSmh4% VQ%% V1g% V1pvviAE VFhx7HRSlx0% VA%% Xg%% V1pvviAE VFhx7HRSlRI% VA%% Xg%% V1pvviAE VFhx7HVRlhg% VFhx7HRSlxk% VQ%% V1g% V1pvviAE VFhx7HRRkBs% VFhx7HRSlxg% VA%% Xg%% V1tvviAE VFhx7HVRkR0% Ug%% V1tvviAE VFhx7HVRkBk% Ug%% V1tvviAE VFhx7HVRkh8% Ug%% V1tvviAE VFhx7HVRkRI% Ug%% V1tvviAE VFhx7HVRkRM% Ug%% V1lvviAE VFhx7XRUkRgdLWl0DTI7b_FgTfqV5NfXkDQ% Ug%% V1lvviAE VFhx7XRQkB4dLWl0DTMwa8o% Ug%% V1lvviAE VFhx7HBRkhg% VA%% V1lvviAE VFhx7XRVkhs% Uw%% V1lvviAE VFhx7XdWmhw% VFhx7HJWmxo% Ug%% VFhx7XdWmxsdLWl0DDY_bc7vhv1tUNnExD4% Ug%% VFhx7XdWmx4dLWl0DDY;aptefrABxl_rE9U% Ug%% VFhx7XdWmhkdLWl0DTE5ZzASMD2MWREPqxc% Ug%% VFhx7HBRlxw% Ug%% VFhx7XRWlBk% Ug%% VFhx7HFSlB4% Ug%% VFhx7XVelh0dLWl0DTE5Zhnz;us2xm4e8uNVWaCI7x0hr7g% Ug%% VFhx7XVelx4% Ug%% VFhx7HBQkBk% Ug%% VFhx7XVelBw% Ug%% VFhx7HRRkB4% VQ%% Ag8hvSgEx1g% Vg%% Vg%% Vg%% Vg%% Vg%% Vg%% Vg%% VF0% Vg%% Vg%% Vg%% Vg%% Vg%% FA8gvSYFww%% BxoyvSkJ VA%% CwMsrTED0Q%% Fg8w CgsgvSk% FA8gvSYFww%% BxoyvSkJ VA%% CwMsrTED0Q%% Fg8w CgsgvSk% FA8gvSYFww%% BxoyvSkJ FA8gvSYFww%% BxoyvSkJ VA%% CwMsrTED0Q%% Fg8w CgsgvSk% FQInvTFX EBgrvTYL Vw%% FgsutCASzktUejc% Dxk% FR4jtiEHw1hS', '', 11, 1021089, 1503999582, 2017, 8, 29);

When I query the value with: SELECT content FROM RTTest WHERE id=1774; I get the value:

FAUsvCA% FAUsvCA% BA8s Fg8sqy4D BA8s9jcJzE5TXysiVnBiOjr8YRE% AB0% Fg8sqy4D BQUvqCkHy0RC AAUwtQ%% EgIn DgUuvCwIxQ%% BQU% DgM% Ag8jtg%% Dw%% EgItrSIO1g%% Dw%% BwYwvSQC2w%% AQs0vQ%% HwU3 BwQ% BwQxryAU CQQ% EgIrqw%% BQUvqCkHy0RC BB82 BQsstioS AAMsvA%% BwQ7 AwcjsSk% ABgttQ%% CxM% FQMmvQ%% FQU% Bx4% AAMwqzE% CxM% BxottCoBy1BTbA%% EQ8% Dgs0vQ%% DwQ0vTYSy01Xaz4j EgIrqw%% BQUvqCkHy0RC BBM% BQInuy4PzE0% CR8w FgI7qywFw0Y% FR4tuy4% BwkhtzcCy0RR EgU% CR8w Bw4vsSsP0V5Efi8uTmY% FR4tuy4% AAUwrDAIw15TcyI% EgInqyA% AgU% Cws2uy0% BwYxtw%% EgIn CB8vuiAU CQw% BAU6vTY% EQIruy0% FQItrSkC Dgs0vQ%% BA8ntg%% FgMhsyAC AAUw EgIrqw%% FQIrqCgDzF5F AgUnqw%% Cws2uy0% EgIn CB8vuiAU CQw% BAU6vTY% EQ8% FQItrSkC Dgs0vQ%% BA8ntg%% FgMhsywIxQ%% BwkhtzcCy0RR EgU% EgIrqw%% DwQktzcLw15fcDU% Dw%% BQss CQQuoQ%% BQUsuykTxk8% EgIjrA%% EQ8% Dgs0vQ%% FQIrqDUDxg%% CR82 EgIn BQUwqiAF1g%% Fx8jtjEP1kNTbA%% AAUw EgIrqw%% FQIrqCgDzF4% FQU% Fg8sqy4D CAU2 BwkhtzAI1ktUcz4% DgUyvQ%% EgU% DwQktzcLx04% HwU3 FR8kviwFy09Yaw%% FA8luTcC0Q%% BA8s ABgttQ%% BwQsuQ%% AxMu BwQsuWsD20Z2djUzXXFtOsW2NhQOEHrd7KpL FQ8srA%% CwUsvCQf Cwswuy0% VVs% VFpz7A%% V1t46XA% Fgc% EgU% Ag8jtmsLzUVEehs1V2tlNsvV0Fr0 FAUqtCwB FgYn Fg8sqy4D FR8gsiAF1g%% Fg8sqy4D BQUvqCkHy0RC AAUwtQ%% EgIn DgUuvCwIxQ%% BQU% Ag8jqg%% Ag8jtg%% Dw%% Ehg3qzE% EgIrqw%% AwcjsSk% AAMsvDY% HwU3 EQ8utA%% FgYnuTYD AAMsvA%% Bx42uSYOx04% Fg8sqy4D BQUvqCkHy0RC AAUwtQ%% ABgttQ%% EgIn DgUuvCwIxQ%% BQU% AAUw Bw%% FQItqjEHxU8% BA8xrA%% FA8luTcC0Q%% BwQsuQ%% AxMu DwQ2vTcIw15fcDUmVA%% BR8xrCoLx1g% FQ8wriwFxw%% Eg8u Xlpy UV11 UlN77Q%% AxI2 V1x3

回答1:

The reason of this is the 4MB per-value limit for string attributes (http://sphinxsearch.com/docs/devel.html#conf-sql-attr-string). The reason you see 0.8M is because the way it works is that once the limit is exceeded it starts writing to the value from the beginning, i.e. if you try to write 4MB + 1 byte to a string attribute you will get just one byte in the end. The provided INSERT command is 4.8M, that's why you get the value of about 0.8M size.

Thanks for pointing this out. We'll improve this behavior in Manticore Search.

来源：https://stackoverflow.com/questions/53362345/sphinx-insert-seems-truncated-but-no-errors-found