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Type: Bug
Resolution: Fixed
Priority: Minor - P4
Fix Version/s: None
Affects Version/s: 2.4.2
Component/s: None
Labels:
None
Environment:
Ruby: 2.4.0
Mongo gem: 2.4.2
Mongodb: Sharded DB running MongoDB v. 3.4.6
mongos and ruby code are running on the same host, connection to mongos is through localhost

Read/write operation on sharded collection occasionally throw TypeError exception. As the errors occur randomly, every few 100s of thousands of calls, it's difficult to provide a working example reliably triggering the bug.
Subsequent invocation of the operation with the same arguments always results in successful execution. As a temporary workaround the following code has been used:

retrying = false
begin
   result = @collection.insert_many(data)
   #found_ids = @collection.find({:id => {'$in' => ids}},:projection => {:id => 1, :_id => 0}).to_a;
   #result = @collection.update_one({:id => j[:id]}, {'$set' => j}, {:upsert => true})
rescue => e
   log_error "#{(retrying)?"***RETRY***":"*will retry*"} Exception: #{e.inspect}\nBacktrace:\n#{e.backtrace.join("\n\t").sub("\n\t", ": #{e}#{e.class ? " (#{e.class})" : ''}\n\t")}\n"
   unless retrying
      retrying = true
      retry
   else
      log_error "***REDO*** Exception occurred in second iteration."
   end
   retrying = false
end

Exception occurring while reading data:

/home/j/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/forwardable.rb:228:in `max_message_size': wrong argument type Integer (expected Proc) (TypeError)
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/server/connection.rb:195:in `block in write'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/server/connection.rb:192:in `each'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/server/connection.rb:192:in `write'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/server/connection.rb:162:in `deliver'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/server/connection.rb:108:in `block in dispatch'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/monitoring/publishable.rb:47:in `publish_command'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/server/connection.rb:107:in `dispatch'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/operation/executable.rb:37:in `block in execute'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/server/connection_pool.rb:107:in `with_connection'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/server.rb:242:in `with_connection'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/operation/executable.rb:35:in `execute'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/collection/view/iterable.rb:81:in `send_initial_query'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/collection/view/iterable.rb:41:in `block in each'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/retryable.rb:43:in `read_with_retry'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/collection/view/iterable.rb:39:in `each'
        ../../prog.rb:271:in `to_a'
        ../../prog.rb:271:in `b_import_data'
        ../../prog:561:in `<main>'

Exception occurring in insert_many:

/home/j/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/forwardable.rb:228:in `cluster': wrong argument type Integer (expected Proc) (TypeError)
        /home/j/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/forwardable.rb:222:in `next_primary'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/bulk_write.rb:58:in `block in execute'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/retryable.rb:104:in `write_with_retry'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/bulk_write.rb:56:in `execute'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/collection.rb:401:in `bulk_write'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/collection.rb:379:in `insert_many'
        ../../prog:277:in `b_import_data'
        ../../prog.rb:544:in `<main>'

There are two exception scenarios for update_one

/home/j/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/forwardable.rb:228:in `max_message_size': wrong argument type Integer (expected Proc) (TypeError)
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/server/connectable.rb:114:in `block in read'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/server/connectable.rb:97:in `ensure_connected'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/server/connectable.rb:113:in `read'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/server/connection.rb:163:in `deliver'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/server/connection.rb:108:in `block in dispatch'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/monitoring/publishable.rb:47:in `publish_command'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/server/connection.rb:107:in `dispatch'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/operation/write/command/writable.rb:39:in `block in execute'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/server/connection_pool.rb:107:in `with_connection'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/server.rb:242:in `with_connection'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/operation/write/command/writable.rb:38:in `execute'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/operation/write/write_command_enabled.rb:57:in `execute_write_command'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/operation/write/write_command_enabled.rb:41:in `execute'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/collection/view/writable.rb:244:in `block in update'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/retryable.rb:104:in `write_with_retry'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/collection/view/writable.rb:234:in `update'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/collection/view/writable.rb:209:in `update_one'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/collection.rb:523:in `update_one'
        ../../prog.rb:141:in `import_data'
        ../../prog.rb:367:in `<main>'

/home/j/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/forwardable.rb:228:in `cluster': wrong argument type Integer (expected Proc) (TypeError)
        /home/j/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/forwardable.rb:222:in `next_primary'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/collection/view/writable.rb:235:in `block in update'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/retryable.rb:104:in `write_with_retry'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/collection/view/writable.rb:234:in `update'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/collection/view/writable.rb:209:in `update_one'
        /home/j/.rvm/gems/ruby-2.4.0/gems/mongo-2.4.2/lib/mongo/collection.rb:523:in `update_one'
        ../../prog.rb:141:in `import_data'
        ../../prog.rb:367:in `<main>'

Mongos log file does not contain any error messages.

duplicates

RUBY-1194 TypeError: wrong argument type Integer (expected Proc) with MRI 2.4

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