FTP poller stalls with threads waiting on PlainSocketImpl.socketAccept()
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Key: SM-915
URL: https://issues.apache.org/activemq/browse/SM-915
Project: ServiceMix
Issue Type: Bug
Components: servicemix-ftp
Affects Versions: 3.1
Reporter: Gert Vanthienen
FTP poller threads stop working with the stack trace below, causing the FTP
client pool to run out of connections
{code}
Name: pool-component.servicemix-ftp-thread-2
State: RUNNABLE
Total blocked: 78,430 Total waited: 4,771
Stack trace:
java.net.PlainSocketImpl.socketAccept(Native Method)
java.net.PlainSocketImpl.accept(PlainSocketImpl.java:384)
java.net.ServerSocket.implAccept(ServerSocket.java:450)
java.net.ServerSocket.accept(ServerSocket.java:421)
org.apache.commons.net.ftp.FTPClient._openDataConnection_(FTPClient.java:502)
org.apache.commons.net.ftp.FTPClient.initiateListParsing(FTPClient.java:2390)
org.apache.commons.net.ftp.FTPClient.initiateListParsing(FTPClient.java:2364)
org.apache.commons.net.ftp.FTPClient.listFiles(FTPClient.java:2141)
org.apache.servicemix.ftp.FtpPollerEndpoint.pollFileOrDirectory(FtpPollerEndpoint.java:211)
org.apache.servicemix.ftp.FtpPollerEndpoint.pollFileOrDirectory(FtpPollerEndpoint.java:203)
org.apache.servicemix.ftp.FtpPollerEndpoint.poll(FtpPollerEndpoint.java:78)
org.apache.servicemix.common.endpoints.PollingEndpoint$PollSchedulerTask$1.run(PollingEndpoint.java:155)
edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:665)
edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:690)
java.lang.Thread.run(Thread.java:595)
{code}
See http://www.nabble.com/FTP-poller-stalls...-tf3490690s12049.html for more
information
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