[jira] [Updated] (CASSANDRA-7766) Secondary index not working after a while

["Fabrice Larcher (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-7766?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Fabrice Larcher updated CASSANDRA-7766:
---------------------------------------

    Description: 
Since 2.1.0-rc2, it appears that the secondary indexes are not always working. Immediately after the INSERT of a row, the index seems to be there. But after a while (I do not know when or why), SELECT statements based on any secondary index do not return the corresponding row(s) anymore. I noticed that a restart of C* may have an impact (the data inserted before the restart may be seen through the index, even if it was not returned before the restart).

Here is a use-case example (in order to clarify my request) :
{code}
CREATE TABLE IF NOT EXISTS ks.cf ( k int PRIMARY KEY, ind ascii, value text);
CREATE INDEX IF NOT EXISTS ks_cf_index ON ks.cf(ind);
INSERT INTO ks.cf (k, ind, value) VALUES (1, 'toto', 'Hello');
SELECT * FROM ks.cf WHERE ind = 'toto'; // Returns no result after a while
{code}

The last SELECT statement may or may not return a row depending on the instant of the request. I experienced that with 2.1.0-rc5 through CQLSH with clusters of one and two nodes. Since it depends on the instant of the request, I am not able to deliver any way to reproduce that systematically (It appears to be linked with some scheduled job inside C*).


  was:
Since 2.1.0-rc2, it appears that the secondary indexes are not always working. Immediately after the INSERT of a row, the index seems to be there. But after a while (I do not know when or why), SELECT statements based on any secondary index do not return the corresponding row(s) anymore. I noticed that a restart of C* may have an impact (the data inserted before the restart may be seen through the index, even if it was not returned before the restart).

Here is a use-case example (in order to clarify my request) :

CREATE TABLE IF NOT EXISTS ks.cf ( k int PRIMARY KEY, ind ascii, value text);
CREATE INDEX IF NOT EXISTS ks_cf_index ON ks.cf(ind);
INSERT INTO ks.cf (k, ind, value) VALUES (1, 'toto', 'Hello');
SELECT * FROM ks.cf WHERE ind = 'toto'; // Returns no result after a while

The last SELECT statement may or may not return a row depending on the instant of the request. I experienced that with 2.1.0-rc5 through CQLSH with clusters of one and two nodes. Since it depends on the instant of the request, I am not able to deliver any way to reproduce that systematically (It appears to be linked with some scheduled job inside C*).

     Attachment: result-success.txt
                 result-failure.txt

You will find some traces attached ; one file the success case and one for the failure case. Here are some information about them ;

*CQL structure :*  
A table {{user}} with an index {{user_email}} on column {{email}} of type {{ascii}}.

*CQLSH commands :*
{code}
    use main;
    tracing on;
    consistency all;
    select * from user where email = 'fabrice.larcher@level5.fr';
{code}

I hope it could help

> Secondary index not working after a while
> -----------------------------------------
>
>                 Key: CASSANDRA-7766
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7766
>             Project: Cassandra
>          Issue Type: Bug
>         Environment: C* 2.1.0-rc5 with small clusters (one or two nodes)
>            Reporter: Fabrice Larcher
>         Attachments: result-failure.txt, result-success.txt
>
>
> Since 2.1.0-rc2, it appears that the secondary indexes are not always working. Immediately after the INSERT of a row, the index seems to be there. But after a while (I do not know when or why), SELECT statements based on any secondary index do not return the corresponding row(s) anymore. I noticed that a restart of C* may have an impact (the data inserted before the restart may be seen through the index, even if it was not returned before the restart).
> Here is a use-case example (in order to clarify my request) :
> {code}
> CREATE TABLE IF NOT EXISTS ks.cf ( k int PRIMARY KEY, ind ascii, value text);
> CREATE INDEX IF NOT EXISTS ks_cf_index ON ks.cf(ind);
> INSERT INTO ks.cf (k, ind, value) VALUES (1, 'toto', 'Hello');
> SELECT * FROM ks.cf WHERE ind = 'toto'; // Returns no result after a while
> {code}
> The last SELECT statement may or may not return a row depending on the instant of the request. I experienced that with 2.1.0-rc5 through CQLSH with clusters of one and two nodes. Since it depends on the instant of the request, I am not able to deliver any way to reproduce that systematically (It appears to be linked with some scheduled job inside C*).



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