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Posted to proton@qpid.apache.org by "Michael (JIRA)" <ji...@apache.org> on 2015/05/29 00:29:17 UTC

[jira] [Updated] (PROTON-892) pn_data_t capacity does not grow above 32768 items

     [ https://issues.apache.org/jira/browse/PROTON-892?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael updated PROTON-892:
---------------------------
    Attachment: 0003-data-capacity.patch

Preliminary patch to alleviate the issue. When data capacity rreaches 32768 nodes, data grows is performed in 1024 items steps

> pn_data_t capacity does not grow above 32768 items
> --------------------------------------------------
>
>                 Key: PROTON-892
>                 URL: https://issues.apache.org/jira/browse/PROTON-892
>             Project: Qpid Proton
>          Issue Type: Improvement
>          Components: proton-c
>    Affects Versions: 0.9, 0.9.1
>            Reporter: Michael
>            Priority: Minor
>         Attachments: 0003-data-capacity.patch
>
>
> pn_data_grow() function looses half of the available data capacity.
> The following happens: when data overflows, pn_data_grow is invoked. It increases data capacity 2 times and reallocates nodes array. Data capacity is represented as uint16_t type and so when capacity reaches 32768 items, the result of multiplication by 2 becomes 0. This makes realloc return null and crashes the program.



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