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ASF subversion and git services commented on NIFI-2928: ------------------------------------------------------- Commit ed035f85e38f7c9efe6ac84c8f13c9a455f7014c in nifi's branch refs/heads/master from [~ozhurakousky] [ https://git-wip-us.apache.org/repos/asf?p=nifi.git;h=ed035f8 ] NIFI-2928 added support to validate accessibility of the file system NIFI-2928 polishing This closes #1160 > FetchFile routes to not.found when it cannot determine whether or not the > file exists > ------------------------------------------------------------------------------------- > > Key: NIFI-2928 > URL: https://issues.apache.org/jira/browse/NIFI-2928 > Project: Apache NiFi > Issue Type: Bug > Components: Core Framework > Affects Versions: 0.7.1 > Reporter: Christopher McDermott > Assignee: Oleg Zhurakousky > Fix For: 1.1.0 > > > I have a flow that reads files from an NFS volume. To simulate the NFS > server being offline/unreachable I am using IP tables to block all TCP > traffic between the NFS server and the host running NiFi. > Trying to read files using FetchFile, I am seeing > 2016-10-20 20:34:31,789 ERROR [Timer-Driven Process Thread-4] > o.a.nifi.processors.standard.FetchFile > FetchFile[id=9e642524-0e05-4d58-aabc-d6b49d687917] Could not fetch file > /share/st5103/REDACTED from file system for > StandardFlowFileRecord[uuid=1f88f322-57a2-4ac5-87df-d53fdd63d52c,claim=StandardContentClaim > [resourceClaim=StandardResourceClaim[id=1476995181657-18524, > container=default, section=92], offset=569544, > length=745],offset=0,name=1248995905448067,size=745] because the file does > not exist; routing to not.found > The file is actually there, but of course it is inaccessible because the > network traffic is blocked. > I see the code is using {{File.exists()}}. > This [bug|https://bugs.openjdk.java.net/browse/JDK-6191254] report suggest > that it should instead use > {{[File.toPath().checkAccess()|http://download.java.net/jdk7/archive/b123/docs/api/java/nio/file/Path.html#checkAccess(java.nio.file.AccessMode...)]}} > {{[java.nio.Files.notExists()|http://docs.oracle.com/javase/7docs/api/java/nio/file/Files.html#notExists-java.nio.file.Path-java.nio.file.LinkOption...-]}} > uses {{checkAccess()}} and might be a drop-in replacement. -- This message was sent by Atlassian JIRA (v6.3.4#6332)