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|ID||Category||Severity||Reproducibility||Date Submitted||Last Update|
|0005627||[Resin]||major||always||01-03-14 13:16||09-12-14 10:50|
|Summary||0005627: data corruption due to improper handing of EINTR|
several JNI methods do not handle an errno of EINTR. The result is corrupted data.
EINTR is the status return of a syscall that was interrupted in order to deliver a signal to the thread. In general, the user process should just restart the syscall. The problem is most likely to occur when resin is sitting on a recv() waiting to get data and the recv syscall gets interrupted by a signal.
The bad methods are:
common/streams.c: std_read(), std_write(), cse_fill_buffer()
resin_os/std.c: std_read(), std_read_nonblock(), std_write(), std_write_nonblock()
(1) The Azul JVM, Zing, can sometimes have a high signal rate, which has then hit this problem.
(2) I've uploaded a fixed version of std.c, with the code ifdef'd by #ifdef FIX_EINTR, to illustrate the correct behavior.
std.c [^] (11,818 bytes) 01-03-14 13:16
std.c.2 [^] (11,855 bytes) 01-15-14 08:30
|I found a typo in std.c after uploading it. The next file, std.c.2, has the typo fixed as well as identifying on other place where EINTR was not correctly handled.|
|01-03-14 13:16||bean||New Issue|
|01-03-14 13:16||bean||File Added: std.c|
|01-15-14 08:25||bean||Issue Monitored: bean|
|01-15-14 08:30||bean||File Added: std.c.2|
|01-15-14 08:32||bean||Note Added: 0006389|
|09-12-14 10:50||ferg||Assigned To||=> ferg|
|09-12-14 10:50||ferg||Status||new => closed|
|09-12-14 10:50||ferg||Resolution||open => fixed|
|09-12-14 10:50||ferg||Fixed in Version||=> 4.0.41|
|09-12-14 10:50||ferg||Additional Information Updated|
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