问题
I have a JAVA app which writes to a replicaset. Am using 3.0.7 version of MongoDB server. The mongo-driver for Java is 3.0.4. It was working just fine but now am getting the following error on ALL writes:
com.mongodb.MongoWriteException: quota exceeded
at com.mongodb.MongoCollectionImpl.executeSingleWriteRequest(MongoCollectionImpl.java:487)
at com.mongodb.MongoCollectionImpl.update(MongoCollectionImpl.java:474)
at com.mongodb.MongoCollectionImpl.updateOne(MongoCollectionImpl.java:325)
Have looked at the MongoDB config documentation and I have not set any quota limits in mongod.conf. Am not using smallFiles either.
But I think am running into fileSize limits. The file sizes for my DB are as follows:
total 6240548
-rw------- 1 mongod mongod 67108864 Dec 8 16:55 2015.0
-rw------- 1 mongod mongod 134217728 Dec 8 12:15 2015.1
-rw------- 1 mongod mongod 268435456 Dec 8 12:15 2015.2
-rw------- 1 mongod mongod 536870912 Dec 8 12:15 2015.3
-rw------- 1 mongod mongod 1073741824 Dec 8 12:15 2015.4
-rw------- 1 mongod mongod 2146435072 Dec 8 16:06 2015.5
-rw------- 1 mongod mongod 2146435072 Dec 8 16:06 2015.6
-rw------- 1 mongod mongod 16777216 Dec 8 16:55 2015.ns
drwxr-xr-x 2 mongod mongod 4096 Dec 7 09:14 _tmp
The /etc/mongod.conf is as follows:
storage:
dbPath: /data/mongoDB
indexBuildRetry: true
repairPath: /data/mongoDB/repair
journal:
enabled: true
directoryPerDB: true
syncPeriodSecs: 60
engine: mmapv1
mmapv1:
preallocDataFiles: false
nsSize: 16
quota:
enforced: false
maxFilesPerDB: 8
smallFiles: false
journal:
debugFlags: 0
commitIntervalMs: 100
What can be going wrong?
PS: /etc/mongod.conf is being used.
mongod 10864 1 0 Nov16 ? 03:10:34 /usr/bin/mongod -f /etc/mongod.conf
Update- 1 .Tried the same update by changing collection name to a new collection. THat worked! but doesnt explain the issue yet. 2. Changed java driver to 3.0.3, that didnt help.
Update- 2:(12/9) Adding Collection Stats, since it is something to do with the collection itself and the java driver. Let me know if something seems awry pls.
{
"ns" : "2015.events",
"count" : 827054,
"size" : 3814018,
"avgObjSize" : 4722,
"numExtents" : 22,
"extents" : [
{
"len" : 8192,
"loc: " : {
"file" : 0,
"offset" : 20480
}
},
{
"len" : 32768,
"loc: " : {
"file" : 0,
"offset" : 2134016
}
},
{
"len" : 131072,
"loc: " : {
"file" : 0,
"offset" : 2166784
}
},
{
"len" : 524288,
"loc: " : {
"file" : 0,
"offset" : 2297856
}
},
{
"len" : 2097152,
"loc: " : {
"file" : 0,
"offset" : 2822144
}
},
{
"len" : 8388608,
"loc: " : {
"file" : 0,
"offset" : 4919296
}
},
{
"len" : 11325440,
"loc: " : {
"file" : 0,
"offset" : 14356480
}
},
{
"len" : 15290368,
"loc: " : {
"file" : 0,
"offset" : 28827648
}
},
{
"len" : 20643840,
"loc: " : {
"file" : 0,
"offset" : 44118016
}
},
{
"len" : 27869184,
"loc: " : {
"file" : 1,
"offset" : 8192
}
},
{
"len" : 37625856,
"loc: " : {
"file" : 1,
"offset" : 36265984
}
},
{
"len" : 50798592,
"loc: " : {
"file" : 1,
"offset" : 78086144
}
},
{
"len" : 68579328,
"loc: " : {
"file" : 2,
"offset" : 8396800
}
},
{
"len" : 92585984,
"loc: " : {
"file" : 2,
"offset" : 93753344
}
},
{
"len" : 124993536,
"loc: " : {
"file" : 3,
"offset" : 8192
}
},
{
"len" : 168742912,
"loc: " : {
"file" : 3,
"offset" : 125001728
}
},
{
"len" : 227803136,
"loc: " : {
"file" : 4,
"offset" : 8192
}
},
{
"len" : 307535872,
"loc: " : {
"file" : 4,
"offset" : 239136768
}
},
{
"len" : 415174656,
"loc: " : {
"file" : 4,
"offset" : 595939328
}
},
{
"len" : 560488448,
"loc: " : {
"file" : 5,
"offset" : 8192
}
},
{
"len" : 756662272,
"loc: " : {
"file" : 5,
"offset" : 607756288
}
},
{
"len" : 1021497344,
"loc: " : {
"file" : 6,
"offset" : 8192
}
}
],
"storageSize" : 3826952,
"lastExtentSize" : 997556,
"paddingFactor" : 1,
"paddingFactorNote" : "paddingFactor is unused and unmaintained in 3.0. It remains hard coded to 1.0 for compatibility only.",
"userFlags" : 1,
"capped" : false,
"nindexes" : 8,
"indexDetails" : {
},
"totalIndexSize" : 348270,
"indexSizes" : {
"_id_" : 47123,
"remoteRequest.uri_1" : 76969,
"transactionId_1" : 59611,
"startTime_1" : 39027,
"endTime_1" : 35235,
"remoteRequest.queryParams.q_1" : 20328,
"remoteRequest.queryParams.fq_1" : 38285,
"elapsedTimeInNanos_1" : 31689
},
"ok" : 1
}
回答1:
Your mongod.conf has a quota enabled for each database. Based on that mongod.conf file, you will be unable to create more than 8 database files, which limits you to a max of about 6.4 GB of storage. You mention that you are able to get around this issue by using a new collection, so I am interested in what your data directory looks like now. I would not expect you to be able to bypass this hard limit, however due to internal data structures, it may be possible to "bypass" it for a short time.
You can verify how much actual data is being stored by running the dbStats command
use 2015
db.stats(1024*1024)
This output will tell you how much data you actually have in the db, vs the amount of allocated storage. These numbers will not match, this is expected as documents include empty space for padding.
My next question would be, is there are reason you are artificially limiting the amount of storage space your mongod can allocate? Perhaps a capped collection would better suit your needs? If you could expand on your use, I can perhaps give you a better answer.
来源：https://stackoverflow.com/questions/34166991/getting-mongodb-error-on-write-quota-exceeded