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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/platform/basic.h"
#include "mongo/s/write_ops/batch_downconvert.h"
#include "mongo/bson/bsonmisc.h"
#include "mongo/db/storage/duplicate_key_error_info.h"
namespace mongo {
using std::string;
Status extractGLEErrors(const BSONObj& gleResponse, GLEErrors* errors) {
// DRAGONS
// Parsing GLE responses is incredibly finicky.
// The order of testing here is extremely important.
///////////////////////////////////////////////////////////////////////
// IMPORTANT!
// Also update extractGLEErrors in batch_api.js for any changes made here.
const bool isOK = gleResponse["ok"].trueValue();
const string err = gleResponse["err"].str();
const string errMsg = gleResponse["errmsg"].str();
const string wNote = gleResponse["wnote"].str();
const string jNote = gleResponse["jnote"].str();
const int code = gleResponse["code"].numberInt();
const bool timeout = gleResponse["wtimeout"].trueValue();
if (err == "norepl" || err == "noreplset") {
// Know this is legacy gle and the repl not enforced - write concern error in 2.4
errors->wcError.reset(new WriteConcernErrorDetail);
std::string msg;
if (!errMsg.empty()) {
msg = errMsg;
} else if (!wNote.empty()) {
msg = wNote;
} else {
msg = err;
}
errors->wcError->setStatus({ErrorCodes::WriteConcernFailed, msg});
} else if (timeout) {
// Know there was no write error
errors->wcError.reset(new WriteConcernErrorDetail);
std::string msg;
if (!errMsg.empty()) {
msg = errMsg;
} else {
msg = err;
}
errors->wcError->setStatus({ErrorCodes::WriteConcernFailed, msg});
errors->wcError->setErrInfo(BSON("wtimeout" << true));
} else if (code == 10990 /* no longer primary */
||
code == 16805 /* replicatedToNum no longer primary */
||
code == 14830 /* gle wmode changed / invalid */
// 2.6 Error codes
||
code == ErrorCodes::NotMaster || code == ErrorCodes::UnknownReplWriteConcern ||
code == ErrorCodes::WriteConcernFailed || code == ErrorCodes::PrimarySteppedDown) {
// Write concern errors that get returned as regular errors (result may not be ok: 1.0)
errors->wcError.reset(new WriteConcernErrorDetail());
errors->wcError->setStatus({ErrorCodes::Error(code), errMsg});
} else if (!isOK) {
//
// !!! SOME GLE ERROR OCCURRED, UNKNOWN WRITE RESULT !!!
//
return Status(ErrorCodes::Error(code ? code : ErrorCodes::UnknownError), errMsg);
} else if (!err.empty()) {
// Write error
errors->writeError.reset(new WriteErrorDetail);
int writeErrorCode = code == 0 ? ErrorCodes::UnknownError : code;
errors->writeError->setStatus({ErrorCodes::Error(writeErrorCode), err});
} else if (!jNote.empty()) {
// Know this is legacy gle and the journaling not enforced - write concern error in 2.4
errors->wcError.reset(new WriteConcernErrorDetail);
errors->wcError->setStatus({ErrorCodes::WriteConcernFailed, jNote});
}
return Status::OK();
}
/**
* Suppress the "err" and "code" field if they are coming from a previous write error and
* are not related to write concern. Also removes any write stats information (e.g. "n")
*
* Also, In some cases, 2.4 GLE w/ wOpTime can give us duplicate "err" and "code" fields b/c of
* reporting a previous error. The later field is what we want - dedup and use later field.
*
* Returns the stripped GLE response.
*/
BSONObj stripNonWCInfo(const BSONObj& gleResponse) {
BSONObjIterator it(gleResponse);
BSONObjBuilder builder;
BSONElement codeField; // eoo
BSONElement errField; // eoo
while (it.more()) {
BSONElement el = it.next();
StringData fieldName(el.fieldName());
if (fieldName.compare("err") == 0) {
errField = el;
} else if (fieldName.compare("code") == 0) {
codeField = el;
} else if (fieldName.compare("n") == 0 || fieldName.compare("nModified") == 0 ||
fieldName.compare("upserted") == 0 ||
fieldName.compare("updatedExisting") == 0) {
// Suppress field
} else {
builder.append(el);
}
}
if (!codeField.eoo()) {
if (!gleResponse["ok"].trueValue()) {
// The last code will be from the write concern
builder.append(codeField);
} else {
// The code is from a non-wc error on this connection - suppress it
}
}
if (!errField.eoo()) {
string err = errField.str();
if (err == "norepl" || err == "noreplset" || err == "timeout") {
// Append err if it's from a write concern issue
builder.append(errField);
} else {
// Suppress non-write concern err as null, but we need to report null err if ok
if (gleResponse["ok"].trueValue())
builder.appendNull(errField.fieldName());
}
}
return builder.obj();
}
} // namespace mongo
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