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mondain/gist:b9963d20c77b12fd79f40f878ab27fcf

Last active July 19, 2018 21:26
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Java File Handles
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gistfile1.md

When we run our Java based server on Linux on certain bare-metal servers we're seeing what may be some sort of file handle leak. To give more detail to this question, what would cause additional handles to be consumed outside of file access and socket creation? To get a total count we use lsof -i -n -p JAVA_APP_PID | wc -l to see the entire listing, we use lsof -i -n -p JAVA_APP_PID. On the listing there are entries like these that we don't recognize:

java     30464 mondain    0u      CHR             136,18      0t0       21 /dev/pts/18
java     30464 mondain    1u      CHR             136,18      0t0       21 /dev/pts/18
java     30464 mondain    2u      CHR             136,18      0t0       21 /dev/pts/18
java     30464 mondain  196u     unix 0x0000000000000000      0t0  5488165 type=STREAM
java     30464 mondain  200r     FIFO               0,10      0t0  5491231 pipe
java     30464 mondain  239u  a_inode               0,11        0     9026 [eventpoll]
java     30464 mondain  240r     FIFO               0,10      0t0  5491912 pipe
java     30464 mondain  241w     FIFO               0,10      0t0  5491912 pipe
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