Re^2: perl process hangs after processing the last file.

Hi cdarke, I cannot paste the code as its confidential. btw strace info is as follows:

strace -fe verbose=all -p 19881

Process 19881 attached - interrupt to quit

read(7,

 

ls -l /proc/19881/fd/

total 0

lr-x------ 1 root root 64 Jan 17 20:02 0 -> pipe:[1771023532]

l-wx------ 1 root root 64 Jan 17 20:02 1 -> pipe:[1771023666]

l-wx------ 1 root root 64 Jan 17 20:02 2 -> pipe:[1771023533]

lrwx------ 1 root root 64 Jan 17 20:02 3 -> socket:[1771025115]

lr-x------ 1 root root 64 Jan 17 20:02 4 -> /opt/opwv/OKRAuser/3.1.1/E
+TL/data/input/rba/abc.log.working

lrwx------ 1 root root 64 Jan 17 20:02 7 -> socket:[1771023680]
[download]

Thanks
AvantA

Comment on Re^2: perl process hangs after processing the last file. Download Code

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Re^3: perl process hangs after processing the last file. by Anonymous Monk on Jan 18, 2011 at 13:48 UTC
I cannot paste the code as its confidential. Sure you can, reduce the code to the minimal possible code that reproduces the problem. How do I post a question effectively?	[reply]
Re^4: perl process hangs after processing the last file. by Anonymous Monk on Jan 18, 2011 at 14:19 UTC
As a bonus, when you do reduce it to a minimal set of code, you often won't need to post it; the problem and its solution will have become obvious.	[reply]
Re^3: perl process hangs after processing the last file. by cdarke (Prior) on Jan 18, 2011 at 16:42 UTC
OK, so it is reading file descriptor 7, which is a socket. So you need to look at your closedown sequence. How does the writer indicate that there is no further data? Does the reader check for this correctly?	[reply]
Re^4: perl process hangs after processing the last file. by avanta (Beadle) on Jan 19, 2011 at 05:22 UTC
Hi cdarke, after some analysis I found the followin info `lsof shows it's an IPv4 connection: perl 2221 root 7u IPv4 1768226357 TCP xyz-server.com:38178->xyz-server.com:7891 (ESTABLISHED) Connection to port 7891 - the JVM used /usr/java/jdk1.6.0_21/bin/java org.perl.inline.java.InlineJavaServer 0 + localhost 7891 true false false` [download] Actually, we are using Inline::Java to use methods in a jar file through perl, basically for SNMP usage. that is the reason for the creation of JVM which is in Shared mode. There is a method which uses the Java module in the 4th Step mentioned in my query above. This is called for all the text files but why is it hanging at the last process having the last file, if java module is the cause. So any suggestions on the same. Thanks AvantA	[reply] [d/l]
Re^5: perl process hangs after processing the last file. by jethro (Monsignor) on Jan 19, 2011 at 10:27 UTC
The first thing you should test is if the problem vanishes when you disable the SNMP code, i.e. the call to the java library.	[reply]