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authorMathieu Pasquet <mathieui@mathieui.net>2014-01-29 16:44:43 +0100
committerMathieu Pasquet <mathieui@mathieui.net>2014-01-29 16:44:43 +0100
commit7e4a5655173e43211d16cc9d223a77bfbc5bc77f (patch)
treea3231ea4cd09d18a6cefcabcd17ccef10a7361b8 /src/logger.py
parent8a44d31e85bc997255d6514bba1f4ee4a19f2da1 (diff)
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Fix a traceback when opening an empty log file
Diffstat (limited to 'src/logger.py')
-rw-r--r--src/logger.py8
1 files changed, 7 insertions, 1 deletions
diff --git a/src/logger.py b/src/logger.py
index fad57bec..7db34932 100644
--- a/src/logger.py
+++ b/src/logger.py
@@ -120,7 +120,13 @@ class Logger(object):
# searching "\nM" nb times from the end of the file. We use mmap to
# do that efficiently, instead of seek()s and read()s which are costly.
with fd:
- m = mmap.mmap(fd.fileno(), 0, prot=mmap.PROT_READ)
+ try:
+ m = mmap.mmap(fd.fileno(), 0, prot=mmap.PROT_READ)
+ except Exception: # file probably empty
+ log.error('Unable to mmap the log file for (%s)',
+ os.path.join(log_dir, jid),
+ exc_info=True)
+ return
pos = m.rfind(b"\nM") # start of messages begin with MI or MR,
# after a \n
# number of message found so far