question Re: Curl throws error when running allow snapshot in Support Questions

Curl throws error when running allow snapshot

sarm — Tue, 14 Apr 2020 03:36:09 GMT

Hi All ,

I am trying to make a directory as a snapshot directory using curl API ,when i run the curl for Allowsnapshot it throws below error

Any help is Appreciated..

Thanks in Advance ..!!

curl -i -X PUT "http://internal:50070/webhdfs/v1/dummy/?op=DISALLOWSNAPSHOT"
HTTP/1.1 400 Bad Request
Cache-Control: no-cache
Expires: Tue, 14 Apr 2020 03:26:30 GMT
Date: Tue, 14 Apr 2020 03:26:30 GMT
Pragma: no-cache
Expires: Tue, 14 Apr 2020 03:26:30 GMT
Date: Tue, 14 Apr 2020 03:26:30 GMT
Pragma: no-cache
Content-Type: application/json
X-FRAME-OPTIONS: SAMEORIGIN
Transfer-Encoding: chunked
Server: Jetty(6.1.26.hwx)

{"RemoteException":{"exception":"IllegalArgumentException","javaClassName":"java.lang.IllegalArgumentException","message":"Invalid value for webhdfs parameter \"op\": No enum constant org.apache.hadoop.hdfs.web.resources.PutOpParam.Op.DISALLOWSNAPSHOT"}}[

Re: Curl throws error when running allow snapshot

jsensharma — Tue, 14 Apr 2020 04:01:06 GMT

@sarm
What is your HDFS version? Is it Hadoop 2.8.0, 3.0.0-alpha1 or higher?

# hadoop version

Quick check on what the JAR contains?

# javap -cp /usr/hdp/3.1.0.0-78/hadoop/client/hadoop-hdfs-client.jar org.apache.hadoop.hdfs.web.resources.PutOpParam.Op | grep -i ALLOW public static final org.apache.hadoop.hdfs.web.resources.PutOpParam$Op ALLOWSNAPSHOT; public static final org.apache.hadoop.hdfs.web.resources.PutOpParam$Op DISALLOWSNAPSHOT;

For example i am able to use the same WebHDFS API call without any issue as following:

# curl -i -X PUT "http://kerlatest1.example.com:50070/webhdfs/v1/tmp/aaaa_bbbb?op=DISALLOWSNAPSHOT&user.name=hdfs" HTTP/1.1 200 OK Date: Tue, 14 Apr 2020 03:45:24 GMT Cache-Control: no-cache Expires: Tue, 14 Apr 2020 03:45:24 GMT Date: Tue, 14 Apr 2020 03:45:24 GMT Pragma: no-cache X-FRAME-OPTIONS: SAMEORIGIN Set-Cookie: hadoop.auth="u=hdfs&p=hdfs&t=simple&e=1586871924286&s=xxxxxxxx/yyyyyyyyy="; Path=/; HttpOnly Content-Type: application/octet-stream Content-Length: 0

Please refer to the following JIRA to verify if you are using the correct version (like
2.8.0, 3.0.0-alpha1 or higher) of HDFS where this option is available?

Reference:
https://issues.apache.org/jira/browse/HDFS-9057
https://cwiki.apache.org/confluence/display/HADOOP/Hadoop+2.8.0+Release (look for HDFS-9057)

Re: Curl throws error when running allow snapshot

sarm — Tue, 14 Apr 2020 04:50:45 GMT

Hi @jsensharma ,

Thanks for your comments .!!

I believe i am using lower version of hadoop that is why the reason i am facing the issue

Hadoop 2.7.3.2.6.5.0-292
Subversion git@github.com:hortonworks/hadoop.git -r 3091053c59a62c82d82c9f778c48bde5ef0a89a1
Compiled by jenkins on 2018-05-11T07:53Z
Compiled with protoc 2.5.0
From source with checksum abed71da5bc89062f6f6711179f2058
This command was run using /usr/hdp/2.6.5.0-292/hadoop/hadoop-common-2.7.3.2.6.5.0-292.jar

#javap -cp /usr/hdp/2.6.5.0-292/hadoop-hdfs//hadoop-hdfs-2.7.3.2.6.5.0-292.jar org.apache.hadoop.hdfs.web.resources.PutOpParam.Op
Compiled from "PutOpParam.java"
public final class org.apache.hadoop.hdfs.web.resources.PutOpParam$Op extends java.lang.Enum<org.apache.hadoop.hdfs.web.resources.PutOpParam$Op> implements org.apache.hadoop.hdfs.web.resources.HttpOpParam$Op {
public static final org.apache.hadoop.hdfs.web.resources.PutOpParam$Op CREATE;
public static final org.apache.hadoop.hdfs.web.resources.PutOpParam$Op MKDIRS;
public static final org.apache.hadoop.hdfs.web.resources.PutOpParam$Op CREATESYMLINK;
public static final org.apache.hadoop.hdfs.web.resources.PutOpParam$Op RENAME;
public static final org.apache.hadoop.hdfs.web.resources.PutOpParam$Op SETREPLICATION;
public static final org.apache.hadoop.hdfs.web.resources.PutOpParam$Op SETOWNER;
public static final org.apache.hadoop.hdfs.web.resources.PutOpParam$Op SETPERMISSION;
public static final org.apache.hadoop.hdfs.web.resources.PutOpParam$Op SETTIMES;
public static final org.apache.hadoop.hdfs.web.resources.PutOpParam$Op RENEWDELEGATIONTOKEN;
public static final org.apache.hadoop.hdfs.web.resources.PutOpParam$Op CANCELDELEGATIONTOKEN;
public static final org.apache.hadoop.hdfs.web.resources.PutOpParam$Op MODIFYACLENTRIES;
public static final org.apache.hadoop.hdfs.web.resources.PutOpParam$Op REMOVEACLENTRIES;
public static final org.apache.hadoop.hdfs.web.resources.PutOpParam$Op REMOVEDEFAULTACL;
public static final org.apache.hadoop.hdfs.web.resources.PutOpParam$Op REMOVEACL;
public static final org.apache.hadoop.hdfs.web.resources.PutOpParam$Op SETACL;
public static final org.apache.hadoop.hdfs.web.resources.PutOpParam$Op SETXATTR;
public static final org.apache.hadoop.hdfs.web.resources.PutOpParam$Op REMOVEXATTR;
public static final org.apache.hadoop.hdfs.web.resources.PutOpParam$Op CREATESNAPSHOT;
public static final org.apache.hadoop.hdfs.web.resources.PutOpParam$Op RENAMESNAPSHOT;
public static final org.apache.hadoop.hdfs.web.resources.PutOpParam$Op NULL;
final boolean doOutputAndRedirect;
final int expectedHttpResponseCode;
final boolean requireAuth;
public static org.apache.hadoop.hdfs.web.resources.PutOpParam$Op[] values();
public static org.apache.hadoop.hdfs.web.resources.PutOpParam$Op valueOf(java.lang.String);
public org.apache.hadoop.hdfs.web.resources.HttpOpParam$Type getType();
public boolean getRequireAuth();
public boolean getDoOutput();
public boolean getRedirect();
public int getExpectedHttpResponseCode();
public java.lang.String toQueryString();
static {};
}